As filed with the Securities and Exchange Commission on July 18, 2003
                                                  Registration No. 333 - 104819

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                               -------------------

                                 AMENDMENT NO. 2
                                       TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                               -------------------

                                ESSEX CORPORATION
             (Exact name of registrant as specified in its charter)

  COMMONWEALTH OF VIRGINIA                                          54-0846569
 (State or other jurisdiction of                              (I.R.S. Employer
  incorporation or organization)                        Identification Number)

                               9150 Guilford Road
                            Columbia, Maryland 21046
                                 (301) 939-7000

(Address,  including zip code,  and telephone  number,  including  area
code, of Registrant's principal executive offices)

   LEONARD E. MOODISPAW                       WITH A COPY TO:
   President and Chief Executive Officer      D. SCOTT FREED, ESQUIRE
   Essex Corporation                          Whiteford, Taylor & Preston L.L.P.
   9150 Guilford Road                         Seven   Saint Paul Street
   Columbia, Maryland  21046                  Baltimore, Maryland 21202
   (301) 939-7000                             (410)347-8700

(Name, address, including zip code, and telephone number, including area code,
of agent for service)

Approximate  date  of  commencement  of  proposed  sale  to  public:  As soon as
practicable after the effective date of this Registration Statement.

         If the only securities  being registered on this form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. / /

         If any of the  securities  being  registered  on  this  form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933,  other than  securities  offered only in connection with
dividend or interest reinvestment plans, check the following box. /X/

         If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. / /

         If this  form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. / /

         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. / /

THE REGISTRANT HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT  SHALL FILE
A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION  STATEMENT
SHALL  THEREAFTER  BECOME  EFFECTIVE  IN  ACCORDANCE  WITH  SECTION  8(a) OF THE
SECURITIES ACT OF 1933, AS AMENDED,  OR UNTIL THE  REGISTRATION  STATEMENT SHALL
BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION
8(a), MAY DETERMINE.





PROSPECTUS                                SUBJECT TO COMPLETION:  July 18, 2003




                                ESSEX CORPORATION

                        2,671,573 Shares of Common Stock

         We have prepared this  prospectus to allow some of our  stockholders to
         sell up to 2,671,573 shares of our common stock. These stockholders may
         sell their  shares at prices which are based on the market price of the
         stock, on United States exchanges or in negotiated transactions.  Essex
         will not receive any of the proceeds from the sale of the shares in the
         offering.

         Our Common Stock trades on the American Stock Exchange under the symbol
         EYW." On July 16,  2003,  the last  reported  sale  price of our common
         stock was $4.68 per share.

                            -------------------------

          INVESTING IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK.
                     SEE "RISK FACTORS" BEGINNING ON PAGE 7.

                            -------------------------


NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION  HAS APPROVED OR  DISAPPROVED  OF THE COMMON STOCK,  OR DETERMINED IF
THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.



                 The date of this Prospectus is _________, 2003.


THE  INFORMATION IN THIS  PROSPECTUS IS NOT COMPLETE AND MAY CHANGE.  WE MAY NOT
SELL THESE  SECURITIES  UNTIL THE  REGISTRATION  STATEMENT FILED WITH THE SEC IS
EFFECTIVE.  THIS  PROSPECTUS IS NOT AN OFFER TO SELL THESE  SECURITIES AND IT IS
NOT SOLICITING AN OFFER TO BUY THESE  SECURITIES IN ANY STATE WHERE THE OFFER OR
SALE IS NOT PERMITTED.





ESSEX HAS NOT AUTHORIZED  ANYONE,  INCLUDING ANY SALESPERSON OR BROKER,  TO GIVE
ORAL OR WRITTEN INFORMATION ABOUT THIS OFFERING,  ESSEX OR THE SHARES COVERED BY
THIS PROSPECTUS THAT IS DIFFERENT FROM THE INFORMATION  INCLUDED OR INCORPORATED
BY REFERENCE IN THIS  PROSPECTUS.  YOU SHOULD NOT ASSUME THAT THE INFORMATION IN
THIS PROSPECTUS,  OR ANY SUPPLEMENT TO THIS PROSPECTUS,  IS ACCURATE AT ANY DATE
OTHER  THAN THE DATE  INDICATED  ON THE  COVER  PAGE OF THIS  PROSPECTUS  OR ANY
SUPPLEMENT TO IT.
                                       2




                       WHERE YOU CAN FIND MORE INFORMATION

         We file annual, quarterly and other reports, proxy statements and other
information  with the SEC. Our SEC filings are  available to the public over the
Internet at the SEC's web site at http://www.sec.gov. You may also read and copy
any document we file at the SEC's public  reference  rooms at 450 Fifth  Street,
N.W., Washington,  D.C., and in New York, New York and Chicago, Illinois. Please
call the SEC at 1-800-732-0330  for further  information on the public reference
rooms.

         For purposes of this  prospectus,  the SEC allows us to "incorporate by
reference"  certain  information we have filed with the SEC, which means that we
are  disclosing  important   information  to  you  by  referring  you  to  other
information  we have filed  with the SEC.  The  information  we  incorporate  by
reference  is  considered  part  of  this   prospectus.   We  specifically   are
incorporating by reference the following documents:

o    Our Annual  Report on Form  10-KSB for the fiscal year ended  December  29,
     2002 and the Form 10-KSB/A No. 1 filed on July 17, 2003

o    Our  Current  Reports on Form 8-K filed on March 7, 2003,  April 17,  2003,
     June 4, 2003 and the Form 8-K/A filed on June 10, 2003.

o    Our Quarterly  Report on Form 10-QSB for the fiscal quarter ended March 30,
     2003.

o    All documents filed by us pursuant to Section 13(a),  13(c), 14 or 15(d) of
     the Securities  Exchange Act of 1934 after the date of this  prospectus and
     before the termination of the offering.

o    The  description of our Common Stock in our Form 8-A filed on June 3, 2003,
     as it may be amended from time to time.

         We are delivering  with this prospectus a copy of the Form 10-KSB/A No.
1 and the Form 10-QSB referred to above. To obtain a copy of other filings at no
cost, you may write or telephone us at the following address:

                               Corporate Secretary
                                ESSEX CORPORATION
                               9150 Guilford Road
                            Columbia, Maryland 21046
                                 (301) 939-7000

         Neither we nor the selling  stockholders have authorized anyone else to
provide you with different information.  Neither we nor the selling stockholders
are making an offer of these  securities  in any state  where the state does not
permit an offer.

                                       3



                           FORWARD-LOOKING STATEMENTS

         Some of the statements contained, or incorporated by reference, in this
prospectus  discuss  future  expectations,  contain  projections  of  results of
operations or financial condition or state other "forward-looking"  information.
Those statements are subject to known and unknown risks, uncertainties and other
factors  that could  cause the actual  results to differ  materially  from those
contemplated by the statements.  The  "forward-looking"  information is based on
various factors and was derived using numerous  assumptions.  In some cases, you
can identify these so-called  "forward-looking  statements" by words like "may,"
"will," "should," "expects," "plans,"  "anticipates,"  "believes,"  "estimates,"
"predicts,"  "potential," or "continue" or the negative of those words and other
comparable  words.  You should be aware that those  statements  only reflect our
predictions.  Actual  events or  results  may  differ  substantially.  Important
factors that could cause our actual results to be materially  different from the
forward-looking  statements  are disclosed  under the heading "Risk Factors" and
throughout this prospectus.

                                ESSEX CORPORATION

         Based  in  Columbia,   Maryland,   Essex  develops  and  commercializes
optoelectronic  devices for  industry and  government.  In the area of services,
Essex  provides  optoelectronic  and signal  processing  expertise to government
customers  under highly  classified  advanced and next  generation  research and
development  contracts,  supports the  intelligence  community  mission critical
voice and video systems  infrastructure,  and provides highly classified systems
engineering  to  government  customers.  In the area of  products,  Essex builds
optical  communications  and  networking  system  elements and  components.  Our
products  and  services  incorporate  advances  achieved  through  more than two
decades  of  pioneering  work  in  developing  high-throughput   optoelectronics
processors  and receivers for image,  signal and data  processing,  and advanced
communications  applications  for  U.S.  intelligence  organizations.  See  "Our
Products and Services" below for more information about our technology, services
and products under development.

                                       4




                          SUMMARY FINANCIAL INFORMATION

         The  following  table  contains  summary  information  derived from the
financial statements included in our Annual Report on Form 10-KSB for the fiscal
year ended December 29, 2002 and Quarterly  Report on Form 10-QSB for the fiscal
quarter ended March 30, 2003,  incorporated by reference  herein,  and should be
read in  conjunction  with those  financial  statements  and the  related  notes
thereto.



                                                      FISCAL YEAR ENDED

                                           DECEMBER 29, 2002  DECEMBER 30, 2001
                                           -----------------  -----------------

                                                        
Revenues                                       $ 4,506 419       $ 2,641,776
Operating loss                                 $(2,150,159)      $(3,577,136)
Net loss                                       $(2,173,617)      $(3,569,199)

Basic Loss Per Common Share                    $     (0.29)      $     (0.67)

Diluted Loss Per Common Share                  $     (0.29)      $       (0.67)

                                                         FISCAL QUARTER ENDED

                                          MARCH 30, 2003 (1)  MARCH 31, 2002
                                          ---------------     --------------

Revenues                                    $3,001,334          $  763,276
Operating Loss                              $   (4,423)         $ (823,889)
Net Loss                                    $ ( 20,081)         $ (830,031)

Basic Loss Per Common Share                 $   ( 0.00)         $   ( 0.11)

Diluted Loss Per Common Share               $    (0.00)         $   ( 0.11)

                                                   AS OF MARCH 30, 2003

Working capital                                       $    882,687

Total Assets                                          $   7,586,712
Goodwill                                              $   3,014,000 (2)
Stockholders' Equity                                  $   4,358,438
Accumulated Deficit                                   $ (14,418,443)



1.       Includes one month of  operations of Sensys  Development  Laboratories,
         Inc.  (SDL),  which  we  acquired  as of  March 1,  2003.  See  "RECENT
         DEVELOPMENTS" below.

2.       Reflects goodwill resulting from our acquisition of SDL.



                                       5




                                  THE OFFERING


Shares of common stock offered by us         None


Shares of common stock that may be           2,671,573
sold by the selling stockholders


Use of Proceeds                              We will not receive any proceeds
                                             from the resale of the shares
                                             offered hereby, all of which
                                             proceeds will be paid to the
                                             Selling Stockholders. See "Use of
                                             Proceeds" on page 18.


Risk Factors                                 The purchase of our common stock
                                             involves a high degree of risk.
                                             You should carefully review and
                                             consider the disclosure under
                                             "Risk Factors" beginning on page 7.


American Stock Exchange Trading Symbol       EYW


                               RECENT DEVELOPMENTS

         Effective March 1, 2003 Essex acquired Sensys Development Laboratories,
Inc.  (SDL),  a  Maryland-based  provider  of systems and  software  engineering
services to the  intelligence  community.  SDL's skill and experience are highly
complementary  to  Essex's  core  competencies  in image and  signal  processing
technology.  The acquisition adds over 25 employees,  an estimated $4 million to
Essex  2003  revenues  and a  solid  base of  contracts  with  excellent  growth
potential.  SDL's revenues were  approximately $3.1 million and $1.1 million for
the fiscal year ended  September 30, 2002 and the fiscal  quarter ended December
31, 2002,  respectively.  Historical  financial  statements of SDL and pro forma
information presenting the effect of the acquisition as if it had been completed
on December 30, 2001 are contained in our Current  Report on Form 8-K filed with
the SEC on April 17, 2003. The Form 8-K is  incorporated  in this  prospectus by
reference.

                                       6




                                  RISK FACTORS

         You  should  carefully  consider  the  following  risk  factors  before
deciding  to invest in our Common  Stock.  You should  also  consider  the other
information  in this  prospectus  and the  additional  information  in our other
reports  on file  with  the  SEC  and in the  other  documents  incorporated  by
reference in this prospectus.  See "Where You Can Find More Information" on page
3.

                     RISKS RELATED TO OUR FINANCIAL RESULTS

WE HAVE A HISTORY OF NET LOSSES AND WE MAY NOT ACHIEVE OR SUSTAIN PROFITABILITY.

         We incurred a net loss for each of our fiscal years ended  December 29,
2002 and December 30, 2001 and for our fiscal  quarter ended March 30, 2003. The
Company also incurred net losses in fiscal 2000 and 1998. In 1999, we reported a
small net income.  As of March 30, 2003, we had an accumulated  deficit of $14.4
million.  Our revenues have  increased  from $2.6 million in fiscal 2001 to $4.5
million in fiscal  2002,  primarily  as a result of higher  revenues  on new and
expanding  U.S.  Government  programs.  In the first fiscal  quarter of 2003 our
revenues were approximately $3.0 million compared to revenues of $763,000 in the
same quarter in 2003,  primarily as a result of expansion of government programs
and the inclusion of one month of results for SDL,  which we acquired  effective
March 1, 2003.  Since  September  2000, we have primarily  funded our operations
from the sale of equity  securities.  We also  expect to incur  significant  but
reduced product  development and related expenses,  and as a result we will need
to increase revenues to achieve profitability.

WE MAY REQUIRE ADDITIONAL  FINANCING TO DEVELOP  COMMERCIAL  APPLICATIONS OF OUR
TECHNOLOGIES,  WHICH FINANCING MAY NOT BE AVAILABLE ON TERMS ACCEPTABLE TO US OR
AT ALL.

         Between   September   2000  and  December   2002,   we  have   received
approximately   $6.6  million  from  Private   Investors  to  pursue  commercial
applications  of  our  optical  and  wireless  communications  technologies  and
resulting  products.  While the Company  believes that it will generate a modest
amount of funds for development  activities from  internally  generated  sources
over the next 12 to 24 months,  receipt of  additional  financing  from external
sources would enable to Company to fund more significant  development activities
on a faster time frame.  Our actual  capital  requirements  depend upon  several
factors that are difficult to predict, including the timing of market acceptance
of our  commercial  products  under  development,  our ability to establish  and
expand our customer base for our commercial products and services,  the level of
expenditures for sales and marketing and general and  administrative  functions,
the level of revenues from our U.S. Government  contracts,  the cost of offering
additional  services  and  other  factors.  If  our  capital  requirements  vary
materially from those currently  planned,  we may require  additional  financing
sooner than anticipated.

         The capital raising environment for small-cap companies like Essex that
are  developing  communications  technology  products  has been and remains in a
depressed state.  Thus, if additional equity funding becomes available it may be
based on an  unacceptably  low valuation for the Company  and/or its  technology
assets.  As a result,  we cannot  assure  you that  additional  funding  will be
available or could be obtained in sufficient  amounts or on terms  acceptable to
us, if at all,  or on terms that would not include  substantial  dilution to our
stockholders.  The Company has not yet  demonstrated  the  sustained  profitable
operations  required to obtain

                                       7


traditional  bank or other debt  financing  and does not have  sufficient  fixed
tangible assets to acquire funds from asset based lenders.  As a result, for the
foreseeable  future  additional  funding for  development  will likely come from
equity financing.  Without additional external financing, we may have to curtail
or eliminate development.

                          RISKS RELATED TO OUR BUSINESS

WE CURRENTLY  RELY ON SALES TO U.S.  GOVERNMENT  ENTITIES,  AND THE LOSS OF SUCH
CONTRACTS WOULD HAVE A MATERIAL ADVERSE IMPACT ON OUR OPERATING RESULTS.

         During  fiscal  2002 and  2001,  contracts  with  the U.S.  Government,
primarily  the  military  services  and other  departments  and  agencies of the
Department of Defense (DoD), accounted for approximately 97%, or $4.4 million of
our  revenues,  and 84%, or $2.2 million of our revenues,  respectively.  In the
fiscal quarter ended March 30, 2003,  revenues on U.S.  Government programs were
$2.9 million, or 96.3% of our revenues.

         The loss or  significant  reduction  in  government  funding of a large
program in which we  participate  could  also  materially  adversely  affect our
future  revenues,  earnings  and cash  flows  and thus our  ability  to meet our
financial  obligations.  U.S.  Government  contracts  are  conditioned  upon the
continuing  approval by Congress of the amount of necessary  spending.  Congress
usually  appropriates  funds for a given  program  each  fiscal year even though
contract  periods  of  performance  may exceed  one year.  Consequently,  at the
beginning of a major  program,  the contract is usually  partially  funded,  and
additional monies are normally  committed to the contract only if appropriations
are made by Congress for future fiscal years.

GOVERNMENT CONTRACTS CONTAIN UNFAVORABLE  TERMINATION PROVISIONS AND ARE SUBJECT
TO AUDIT AND MODIFICATION.

         Companies engaged in supplying  defense-related  services and equipment
to U.S.  Government  agencies are subject to certain  business risks peculiar to
the defense industry.  These risks include the ability of the U.S. Government to
unilaterally:

o    suspend us from  receiving  new  contracts  pending  resolution  of alleged
     violations of procurement laws or regulations;

o    terminate existing contracts;

o    reduce the value of existing contracts;

o    audit our  contract-related  costs and fees,  including  allocated indirect
     costs; and

o    control and potentially prohibit the export of our products.

         Any of our U.S.  Government  contracts  can be  terminated  by the U.S.
Government  either  for its  convenience  or if we default by failing to perform
under the contract.  Termination for convenience provisions provide only for our
recovery of costs incurred or committed,  settlement  expenses and profit on the
work completed prior to termination.  Termination for default provisions provide
for the contractor to be liable for excess costs incurred by the U.S. Government
in procuring undelivered items from another source.

                                       8




OUR FIXED PRICE CONTRACTS MAY COMMIT US TO UNFAVORABLE TERMS.

         We provide  some of our  products  and  services  through  fixed  price
contracts.  Fixed price  contracts  provided 45% and 28% of our sales for fiscal
2001 and 2002, respectively. In a fixed price contract, the price is not subject
to  adjustment  based on cost  incurred to perform the  required  work under the
contract.  Therefore, we fully absorb cost overruns on fixed price contracts and
this reduces our profit margin on the  contract.  Those cost overruns may result
in a  loss.  A  further  risk  associated  with  fixed  price  contracts  is the
difficulty  of  estimating  sales and costs that are related to  performance  in
accordance with contract  specifications  and the possibility of obsolescence in
connection  with  long-term   procurements.   Failure  to  anticipate  technical
problems,  estimate  costs  accurately or control costs during  performance of a
fixed price contract may reduce our profit or cause a loss on the contract.

SINCE WE ARE CURRENTLY  DEVELOPING  OUR OPTICAL AND WIRELESS  TELECOMMUNICATIONS
PRODUCTS IT IS DIFFICULT TO EVALUATE OUR FUTURE BUSINESS AND PROSPECTS.

         We have traditionally derived our revenues from providing  engineering,
communications and signal processing services to the U.S.  Government.  While we
continue to provide  these  services,  over the past year we have  continued  to
emphasize  our  work  on  developing  new   optoelectronics   telecommunications
products,  including  HYPERFINE WDM fiber optic  communications  technology  and
Optical Processor Enhanced Receiver Architecture (OPERA(TM)) technology. Because
our  development  efforts on these  products  are  ongoing and we have not begun
significant commercial sales of these products, our revenue and profit potential
is unproven and our limited history in the commercial  telecommunications  field
makes it difficult to evaluate our business and  prospects.  We have  difficulty
accurately  forecasting our commercial  revenue,  and we have limited historical
financial  data upon  which to base  operating  production  budgets.  You should
consider  our  business  and  prospects  in light of the  heightened  risks  and
unexpected  expenses  and  problems  we may  face as a  company  developing  new
commercial products for a rapidly changing industry.

IF WE DO NOT SUCCESSFULLY  IMPLEMENT OUR PLAN TO EXPAND INTO COMMERCIAL  MARKETS
WE WILL HAVE LESS  POTENTIAL  FOR GROWTH IN  REVENUES  AND PROFITS AND OUR STOCK
PRICE AND VALUATION MAY DECLINE.

         In  addition  to  continuing  to  pursue  our  business  with  the U.S.
Government,  we are focusing our technical capabilities and expertise on related
commercial  markets,  including  HYPERFINE WDM,  OPERA(TM) and ImSyn(TM).  These
products are still under various sTages of development.  As such, these products
are subject to certain risks and may require us to:

o    develop marketing, sales and customer support capabilities;

o    obtain customer and/or regulatory certification;

o    respond to rapid technological advances; and

o    obtain customer acceptance of these products and product performance.

         Our  efforts  to enter  commercial  markets  will  require  significant
resources,  including  additional working capital and capital  expenditures,  as
well as the use of  management's  time.  Our  efforts  to  sell  our  commercial
telecommunications  products,  particularly our optical networking and broadband
wireless communications products, also may depend to a significant

                                       9


degree on the  efforts of  independent  distributors  or  communication  service
providers.  We can not assure you that these  distributors or service  providers
will be able to market our products or their  services  successfully  or that we
will be able to realize a return on our investments in them.

         If we are not successful in addressing the above risks or in developing
these commercial business  opportunities then our business will remain primarily
that of a  government  contractor.  In that event,  the  Company  will have less
potential for  significant  growth in revenues and profits and will be valued by
investors  accordingly.  The Company's failure to develop commercial markets for
its  technologies  may lead  investors  that  purchased  our stock  based on the
potential  for such  markets to sell their shares and this could cause our stock
price and valuation to decline.

OUR STRATEGY INVOLVES PURSUING  STRATEGIC  ACQUISITIONS AND INVESTMENTS THAT MAY
NOT BE SUCCESSFUL.

         Our  business   strategy   includes   acquiring  or  making   strategic
investments  in  other  companies  with a view to  expanding  our  portfolio  of
products  and  services,  acquiring  new  technologies,   and  accelerating  the
development  of new or  improved  products.  To do so, we may issue  equity that
would dilute our current  shareholders'  percentage ownership or incur or assume
indebtedness.  In  addition,  we may  incur  significant  amortization  expenses
related  to  intangible  assets.  We also may incur  significant  write-offs  of
goodwill associated with companies,  businesses or technologies that we acquire.
Acquisitions and strategic investments involve numerous risks, including:

o    difficulties in integrating the operations,  technologies,  and products of
     the acquired companies;

o    diversion of management's attention from our core business;

o    potential difficulties in completing projects of the acquired company;

o    the potential loss of key employees of the acquired company; and

o    dependence on unfamiliar or relatively small supply partners.

         In addition,  acquisitions and strategic  investments may involve risks
of  entering  markets in which we have no or limited  direct  prior  experience,
where  competitors  in  such  markets  have  stronger  market  positions  and of
obtaining  insufficient  revenues to offset increased  expenses  associated with
acquisitions.

OUR SUCCESS LARGELY DEPENDS ON OUR ABILITY TO RETAIN KEY PERSONNEL.

         Our success has always depended in large part on our ability to attract
and retain highly-skilled technical,  managerial, sales and marketing personnel,
particularly  those  skilled  and  experienced  in  optoelectronics  and optical
communications  equipment.  The  loss  of key  personnel  may  prevent  us  from
completing current development and restrict new development.

                                       10




IF WE ARE UNABLE TO DEVELOP AND SUCCESSFULLY INTRODUCE NEW AND ENHANCED PRODUCTS
THAT  MEET THE NEEDS OF OUR  CUSTOMERS  IN A TIMELY  MANNER,  OUR  REVENUES  AND
RESULTS OF OPERATIONS COULD BE ADVERSELY AFFECTED.

         Our future success  depends on our ability to anticipate our customers'
needs and develop products that address those needs. Technological change in the
optical networking industry is occurring at a rapid pace. As a result, we expect
there to be frequent new product introductions, changes in customer requirements
and evolving industry  standards.  We may not be able to develop new products or
enhancements to our existing  products in a timely manner, or at all. This would
cause  potential  customers  to seek other  solutions,  which  would  reduce our
revenues and adversely affect our results of operations and financial condition.

         We are currently  developing many potential optical networking products
through our research and development efforts.  Although we have several products
in development, we may not bring all of these potential products into commercial
production due to:

o    changes in customer demand;

o    technological developments that make our products less competitive;

o    evolving industry standards; or

o    allocation of our limited resources to other products or technologies.

         If we incur  significant  expenses  developing  products that we do not
produce  commercially,  or if we select the wrong  products or  technologies  to
bring into commercial  production,  our revenues and results of operations could
be  adversely  affected  and  we  may  not  recover  significant   research  and
development expenses.

ONE ASPECT OF OUR SUCCESS IS DEPENDENT ON OUR OPTOELECTRONICS TELECOMMUNICATIONS
PRODUCTS BEING  DEVELOPED.  FAILURE OF OUR PRODUCTS TO OPERATE AS EXPECTED COULD
DELAY OR  PREVENT  THEIR  DEPLOYMENT  AND SALE AND COULD  SERIOUSLY  IMPAIR  OUR
COMMERCIAL BUSINESS AND PROSPECTS.

         Our future growth and success depends in part on the commercial success
of our optical and wireless telecommunications products being developed. We have
begun limited commercial sales of our products and have produced devices only to
specifications  required in order to conduct  laboratory tests and field trials.
Some of our devices have been deployed in field trials,  others have been tested
in our  laboratories  and still others are in earlier stages of development.  If
our  products  fail to operate as  expected,  this could delay or prevent  their
deployment and sale and could seriously impair our business and prospects.

THE  MARKET WE INTEND TO SERVE IS HIGHLY  COMPETITIVE  AND WE MAY NOT BE ABLE TO
ACHIEVE OR MAINTAIN PROFITABILITY.

         Competition in the network communications  equipment market is intense.
This market has historically  been dominated by such large companies as Alcatel,
Ciena,  Cisco  Systems,  JDS  Uniphase,  Lucent  Technologies,  NEC  and  Nortel
Networks. Some of these companies, as well as emerging companies,  are currently
developing  products  that may  compete  in the  specialty  areas  that  Essex's
technology  is  designed to address.  We may face  competition  from other large

                                       11


communications  companies  who may enter  our  proposed  markets.  Many of these
possible competitors have longer operating histories,  greater name recognition,
larger customer bases and greater  financial,  technical and sales and marketing
resources  than  we do and may be able to  undertake  more  extensive  marketing
efforts  and adopt more  aggressive  pricing  policies  than we can.  Due to the
rapidly  evolving  markets  in which we  compete,  additional  competitors  with
significant  market  presence  and  financial  resources  may enter our markets,
further intensifying competition.

IF WE ARE UNABLE TO PROTECT OUR  INTELLECTUAL  PROPERTY  EFFECTIVELY,  WE MAY BE
UNABLE TO PREVENT THIRD PARTIES FROM USING OUR TECHNOLOGIES,  WHICH WOULD IMPAIR
OUR COMPETITIVE ADVANTAGE.

         We rely on a  combination  of patent,  copyright,  trademark  and trade
secret laws and restrictions on disclosure to protect our intellectual  property
rights. We also enter into  confidentiality  or license  agreements with our key
employees  and  consultants  and  control  access  to  and  distribution  of our
software,  documentation and other proprietary information. The Company believes
that  its  patents  and  patent  applications  provide  it  with  a  competitive
advantage.  Accordingly,  in the event the Company's  products and  technologies
under development gain market  acceptance,  patent protection would be important
to the Company's  business.  However,  obtaining  patent and other  intellectual
property  protection may not adequately  protect our rights or permit us to gain
or keep any  competitive  advantage.  For  instance,  unauthorized  parties  may
attempt to copy,  reverse  engineer  or  otherwise  obtain and use our  patented
products or technology  without our permission,  thus eroding or eliminating the
competitive  advantage we hope to gain though the exclusive  rights  provided by
patent  protection.  Moreover,  our existing patents and patents we have applied
for (if  granted)  may not  protect us against  competitors  that  independently
develop proprietary  technologies that are substantially  equivalent or superior
to our technologies,  or design around our patents. In addition, the competitive
advantage  provided by patenting our  technology may erode if we do not upgrade,
enhance and  improve  our  technology  on an ongoing  basis to meet  competitive
challenges.

         Monitoring  unauthorized  use of our  technology is  difficult,  and we
cannot be certain that the steps we have taken will prevent  unauthorized use of
our technology, particularly in foreign countries where the laws may not protect
our proprietary rights as fully as in the United States. A complete  description
of Essex's patents and patent  applications is contained in our Annual Report on
Form 10-KSB for fiscal 2002. The Form 10-KSB is  incorporated in this prospectus
by  reference  and we are  delivering  a copy of the report  together  with this
prospectus.

THERE IS A RISK THAT SOME OF OUR PATENT APPLICATIONS WILL NOT BE GRANTED.

         Although we have  received  notice of allowance of our first  HYPERFINE
WDM patent,  we have filed several other  applications for U.S. patents relating
to our HYPERFINE WDM and OPERA(TM)  technologies,  and there is a risk that some
or all of the  pending  applications  will not  issue as  patents.  Although  we
believe  our  patent   applications  are  valid,  the  failure  of  our  pending
applications to issue as patents would affect the competitive  advantage we hope
to gain by  obtaining  patent  protection  and thus likely could have a material
adverse effect upon our business and results of operations.

                                       12


WE MAY BECOME INVOLVED IN INTELLECTUAL PROPERTY DISPUTES, WHICH COULD SUBJECT US
TO  SIGNIFICANT  LIABILITY,  DIVERT THE TIME AND ATTENTION OF OUR MANAGEMENT AND
PREVENT US FROM SELLING OUR PRODUCTS.

         We or our  customers  may be a party to  litigation  in the  future  to
protect our intellectual  property or to respond to allegations that we infringe
on others'  intellectual  property.  Any  parties  asserting  that our  products
infringe upon their  proprietary  rights would force us to defend  ourselves and
possibly our customers against the alleged infringement.  If we are unsuccessful
in any  intellectual  property  litigation,  we could be subject to  significant
liability for damages and loss of our proprietary rights.  Intellectual property
litigation,  regardless  of its  success,  would  likely be time  consuming  and
expensive  to resolve  and would  divert  management's  time and  attention.  In
addition, we could be forced to do one or more of the following:

o    stop  selling,  incorporating  or  using  our  products  that  include  the
     challenged intellectual property;

o    obtain  from  the  owner of the  infringed  intellectual  property  right a
     license to sell or use the relevant  technology,  which  license may not be
     available on reasonable terms, or at all; or

o    redesign those products that use the technology.

         If we are forced to take any of these  actions,  our business  could be
seriously harmed.

IF NECESSARY  LICENSES OF THIRD-PARTY  TECHNOLOGY ARE NOT AVAILABLE TO US OR ARE
VERY EXPENSIVE, OUR BUSINESS WOULD BE SERIOUSLY HARMED.

         From time to time we may be required to license  technology  from third
parties  to sell  or  develop  our  products  and  product  enhancements.  These
third-party  licenses  may not be  available  to us on  commercially  reasonable
terms,  if at all. Our inability to maintain or obtain any  third-party  license
required to sell or develop our products and product  enhancements could require
us to obtain substitute  technology of lower quality or performance standards or
at greater cost. If we were required to use  technology  with lower  performance
standards  or quality,  customers  may stop buying our  products  and this would
cause our  revenues  to  decline.  Similarly,  if our costs rise  significantly,
customers may choose less expensive alternative products,  which would cause our
revenues to decline.

                RISKS RELATED TO THE OPTICAL NETWORKING INDUSTRY

THE OPTICAL NETWORKING  INDUSTRY IS DEVELOPING,  UNPREDICTABLE AND CHARACTERIZED
BY RAPID TECHNOLOGICAL CHANGES AND EVOLVING STANDARDS. IF THIS INDUSTRY DOES NOT
DEVELOP AND EXPAND AS WE ANTICIPATE, DEMAND FOR OUR PRODUCTS MAY FAIL TO GROW OR
MAY DECLINE, WHICH WOULD ADVERSELY AFFECT OUR REVENUES.

         The optical  networking  industry is developing  and  characterized  by
rapid  technological  change,  frequent  new product  introductions,  changes in
customer requirements and continuously evolving industry standards. As a result,
it is  difficult  to predict  its  potential  size and future  growth  rate.  In
addition,  evolving customer  requirements and industry standards are uncertain.
Our success in generating  revenues in this  evolving  market will depend on our
ability to:

                                       13


o    establish,  maintain and enhance our relationships  with optical networking
     customers;

o    convince our customers of the benefits of next-generation optical networks;
     and

o    predict  accurately,  and develop our products to meet,  evolving  customer
     requirements and industry standards.

         If we fail to address changing market conditions, sales of our products
may fail to grow or may decline, which would adversely affect our revenues.

THE OPTICAL  NETWORKING  EQUIPMENT  INDUSTRY IS EXPERIENCING  DECLINING  AVERAGE
SELLING PRICES, WHICH COULD ADVERSELY AFFECT OUR REVENUES AND GROSS MARGINS.

         The optical  networking  equipment  industry is experiencing  declining
average  selling prices as a result of increasing  competition  and greater unit
volumes as  communications  service  providers  continue  to deploy  fiber optic
networks. We anticipate that average selling prices will continue to decrease in
the future in response to product introductions by competitors,  price pressures
from significant customers and greater manufacturing efficiencies. These average
selling price declines may  contribute to a decline in our gross margins,  which
could adversely affect our results of operations.

IF THE  INTERNET  AND  COMMERCIAL  DATA  NETWORKS DO NOT  CONTINUE TO EXPAND AND
NEXT-GENERATION  OPTICAL  NETWORKS ARE NOT DEPLOYED AS RAPIDLY AS WE ANTICIPATE,
SALES OF OUR PRODUCTS  UNDER  DEVELOPMENT  MAY DECLINE,  AND OUR REVENUES MAY BE
ADVERSELY AFFECTED.

         Our future  commercial  success depends on the continued  growth of the
Internet and  commercial  data  networks for  commerce and  communications,  the
continuing  increase  in the  amount  of data  transmitted  over  communications
networks and the increasing  adoption of, and  improvements to, optical networks
to meet the increased  demand for  bandwidth.  If data  networks,  including the
Internet,  do not continue to expand as a widespread  communications  medium and
commercial  marketplace,  the need for significantly  increased bandwidth across
networks  and the market for optical  networking  products  may not  continue to
develop.  Future demand for the products we are developing is uncertain and will
depend to a great  degree on the  continued  growth  and  upgrading  of  optical
networks.

BECAUSE OPTICAL  PRODUCTS ARE COMPLEX AND ARE DEPLOYED IN COMPLEX  ENVIRONMENTS,
THE PRODUCTS WE ARE DEVELOPING MAY HAVE DEFECTS THAT WE DISCOVER ONLY AFTER FULL
DEPLOYMENT, WHICH COULD SERIOUSLY HARM OUR BUSINESS.

         Optical  products  are complex and are designed to be deployed in large
quantities across complex networks.  Because of the nature of the products, they
can only be fully tested when  completely  deployed in large  networks with high
amounts of traffic.  Customers may discover errors or defects in the hardware or
the  software,  or products we develop may not operate as  expected,  after they
have been fully deployed. If we are unable to fix defects or other problems that
may be identified in full deployment, we would likely experience:

o    loss of, or delay in, revenue and loss of market share;

o    loss of existing customers;

                                       14



o    difficulties in attracting new customers or achieving market acceptance;

o    diversion of development resources;

o    increased service and warranty costs;

o    legal actions by our customers; and

o    increased insurance costs.

         The  occurrence  of any of  these  problems  could  seriously  harm our
business,  financial condition and results of operations.  Defects,  integration
issues or other performance  problems could result in financial or other damages
to our customers or could negatively  affect market  acceptance for the products
we develop.  Our customers could also seek damages for losses from us, which, if
they were successful, would seriously harm our business, financial condition and
results of operations.  A product  liability  claim brought  against us, even if
unsuccessful,  would likely be time  consuming and costly and would put a strain
on our management and resources.

                         RISKS RELATED TO THIS OFFERING

A LIMITED NUMBER OF STOCKHOLDERS  ARE ABLE TO EXERT  SIGNIFICANT  INFLUENCE OVER
MATTERS REQUIRING STOCKHOLDER APPROVAL.

         Since  September  2000,  the  Company  has  engaged in several  private
placements with a few private investors or their  affiliates.  We refer to these
entities and their affiliates as the "Private Investors". As of the date of this
prospectus,  these Private Investors hold collectively approximately 3.6 million
shares of common stock,  including  1,166,666  shares of Common Stock covered by
this  Prospectus.  The Private  Investors also hold warrants  exercisable  under
certain  circumstances  for up to  two  million  shares  of  our  common  stock.
Accordingly,  the Private Investors could seek to exercise  significant  control
and influence of certain actions requiring the approval of the holders of shares
of our common stock. This concentration of ownership may also delay or prevent a
change in control of Essex or reduce the price other  investors might be willing
to pay for our common stock. In addition, the interests of the Private Investors
may conflict with the interests of other holders of our common stock.

THERE IS  CURRENTLY  ONLY A LIMITED  PUBLIC  MARKET FOR OUR COMMON STOCK AND OUR
COMMON STOCK IS SUBJECT TO SIGNIFICANT PRICE fluctuations.

         Our common stock has recently been included for listing on the American
Stock Exchange (AMEX). Prior to the AMEX listing, our common stock was traded on
the OTC  Bulletin  Board.  Historically,  there has been  only a limited  public
market  for our common  stock and we do not expect an active and robust  trading
market  to  develop  until the  number  of shares in the hands of the  public is
substantially  increased.  In addition,  in the event our operating results fall
below the expectations of public market analysts and investors, the market price
of our common stock would likely be materially adversely affected.

         The  trading  price of our common  stock is likely to be  volatile  and
sporadic.  The stock market in general,  and the market for technology companies
in particular,  has experienced  extreme  volatility.  This volatility has often
been unrelated to the operating performance of particular companies.  Volatility
in the market price of our common stock may prevent investors

                                       15


from being able to sell their common stock at or above the price such  investors
paid for their shares or at any price at all.

SALES BY THE SELLING STOCKHOLDERS OR OTHERS OF A SIGNIFICANT NUMBER OF SHARES OF
COMMON STOCK COULD HAVE A MATERIAL ADVERSE EFFECT ON PREVAILING MARKET PRICES.

         We cannot predict what effect,  if any, that future sales of shares, or
the availability of shares for future sale, will have on the market price of our
common stock  prevailing from time to time.  Nevertheless,  sales of substantial
amounts of common stock by the selling stockholders, or the perception that such
sales may occur,  could  have a material  adverse  effect on  prevailing  market
prices.

         At March 31, 2003, we have outstanding approximately 8.9 million shares
of our common stock,  approximately 4,348,000 of which were sold or issued by us
in private  transactions in reliance upon exemptions from registration under the
Securities Act. (See "Other Business  Information - Recent  Developments" in our
2002 Form 10-KSB for further  information.) These privately placed shares may be
sold only pursuant to an effective  registration  statement filed by Essex or an
applicable exemption,  including the exemption contained in Rule 144 promulgated
under the Securities Act. In general,  under Rule 144 as currently in effect,  a
shareholder,  including an  affiliate of Essex,  may sell shares of common stock
after at least one year has elapsed  since such shares were  acquired from us or
an  affiliate  of ours.  The number of shares of common  stock which may be sold
within any three-  month  period is limited to the greater of one percent of the
then outstanding  number of shares of common stock or the average weekly trading
volume in the common stock during the four calendar weeks  preceding the date on
which notice of such sale was filed under Rule 144.  Certain other  requirements
of Rule 144 concerning  availability of public  information,  manner of sale and
notice of sale must also be satisfied. In addition, a shareholder who is not our
affiliate (and who has not been our affiliate for 90 days prior to the sale) and
who has beneficially owned shares acquired from us or our affiliate for over two
years may resell the shares without  compliance with the foregoing  requirements
under Rule 144.

         In  addition  to the shares  covered by this  prospectus,  the  Private
Investors  have been  granted  rights to have up to  2,000,000  shares of common
stock issuable upon exercise of warrants  registerable  under the Securities Act
upon demand and another  approximately  600,000  shares of common stock  through
"piggy-back" registration rights. We have also filed a registration statement to
register an additional 785,000 shares held by the Private Investors and by other
parties. Sales of substantial amounts of common stock under Rule 144 or pursuant
to the  holder's  registration  rights,  or the  perception  that such sales may
occur, could have a material adverse effect on prevailing market prices.

WE ARE AT RISK OF SECURITIES  CLASS ACTION  LITIGATION DUE TO OUR EXPECTED STOCK
PRICE VOLATILITY.

         In the past,  securities class action litigation has often been brought
against  companies  after  periods of  volatility  in the market  price of their
securities.  Securities  litigation could result in substantial costs and divert
management's  attention  and resources  from our business.  Due to the potential
volatility of our stock price, we may be the target of securities  litigation in
the future.

                                       16




                            OUR PRODUCTS AND SERVICES

         Capitalizing  on our expertise  and success in developing  and building
optoelectronic systems for national security applications, we has developed five
core areas of technological expertise and intellectual property:

1)   Optoelectronic  processors and processing  (including the Advanced  Optical
     Processor   (AOP)   program  and  Optical   Processor   Enhanced   Receiver
     Architecture (OPERA(TM)) technology);

2)   HYPERFINE   WAVELENGTH   DIVISION   MULTIPLEXING   (WDM)   technology   for
     telecommunications;

3)   Communications  services  (including the  capabilities  of the newly formed
     Communications Services Division);

4)   Signal  processing  (including the capabilities of recently acquired Sensys
     Development Laboratories, Inc.); and

5)   Virtual Lens Imaging (VLI) technology (including the ImSyn(TM)processor and
     technology, for above and below ground imaging).

         Our services and products for sale and under development include:

o    The  Advanced  Optical  Processor  (AOP)  being  developed  by Essex  under
     contract  for the United  States  Missile  Defense  Agency (MDA) is a third
     generation device which leverages spread spectrum signal analysis, wideband
     ELINT (electronic  intelligence) and cryptologic  exploitation.  The AOP is
     used for ballistic missile defense environments. In these environments, not
     only must the missile  target be  identified  using  Range-Doppler  Imaging
     (RDI), but other items that are sent into the threat environment to make it
     harder to identify and "kill" the missile  target must also be  identified.
     Other items launched along with the missile include chaff, debris,  closely
     spaced objects,  jammers,  spoofers and missile  decoys.  The AOP is a high
     performance radar signal processor that provides the true correlation-based
     image  formation for ballistic  missile  defense in a  cost-effective,  low
     size, low weight and low power package. Separately, OPERA(TM), an optically
     enhanced  digital  signal  processing   technology,   has  demonstrated  in
     laboratory  modeling  a dramatic  increase  in the  quality of service  and
     carrying  capacity for CDMA wireless  telecommunications  systems.  Further
     development  and testing of  OPERA(TM)has  been  temporarily  delayed until
     funding is identified and obtained to finance such activity.

o    An   all-optical,   all-passive   technique,   HYPERFINE  WDM  fiber  optic
     communications  technology,  which has shown to significantly  increase the
     number of channels and their  combined  bandwidth  used for DWDM.  The core
     HYPERFINE WDM technology provides:

-    All passive optical components;

-    Simple and small packaging, using standard manufacturing processes;

                                       17



-    Excellent channel isolation;

-    High density--50 MHz to 100 GHz spacing;

-    Superior response and flat filter shapes with excellent channel isolation;

-    Passband shapes that can be tailored for each application;

-    Low insertion loss;

-    Low temperature sensitivity; and

-    Fixed or tunable designs.

o    In late 2002 Essex received a  telecommunication  services  contract with a
     potential  total  multiyear  contract  value of $30  million and formed the
     Communications Services Division (CSD) to provide telecommunication systems
     support in the area of modernization,  project management,  integration and
     engineering  analysis.  The CSD will focus on supporting  the  intelligence
     community's   mission-critical  voice  and  video  systems  and  associated
     infrastructure.

o    Essex has acquired SDL, a  Maryland-based  provider of systems and software
     engineering  services  to  the  intelligence  community.  SDL's  skill  and
     experience are highly  complementary to Essex's core  competencies in image
     and signal processing technology.

o    The Virtual Lens  Imaging  technology  (VLI) is a patented  high-resolution
     imaging  system that  leverages  Essex's  experience in synthetic  aperture
     imagery and optoelectronic system development. The Company's VLI technology
     is  based  on the key  features  of its  optoelectronic  processor  and its
     ability to calculate images from non-uniform data in real time. Separately,
     our high-speed optoelectronic processor, Image Synthesis (ImSynTM), enables
     extraordinarily  fast  processing of data for complex  visual image systems
     including radar imaging,  magnetic resonance imaging (MRI),  microscopy and
     ultrawideband  signal  processing.  We  are  currently  seeking  additional
     funding  to  further  the  development  and  testing  of second  generation
     ImSyn(TM) processors in 2003.

         Essex currently does not have sufficient  resources to bring all of its
telecommunications   and   optoelectronics   processing   devices   to   market.
Accordingly,  Essex will  likely  have to partner  with or enter into  licensing
arrangements with major industry participants in order to successfully introduce
in large  volume its  technology  and  products.  In addition,  several  optical
telecommunications and fiber optic companies, both established and emerging, are
currently  developing  products  that may  compete in the  specialty  areas that
Essex's  technology is designed to address.  Most of these  companies are larger
and  more  established   than  Essex  and  have  existing   customer  bases  and
significantly  greater  access  to  capital  resources  than  Essex.  See  "RISK
FACTORS."


                                 USE OF PROCEEDS

         We will not receive any  proceeds  from the sale of the Common Stock by
the selling stockholders.

                                       18


                              SELLING STOCKHOLDERS

         This prospectus  relates to the offering by the  stockholders  named in
the prospectus for resale of up to 2,671,573 shares of common stock.  Throughout
this prospectus, we may refer to these stockholders and their pledgees,  donees,
transferees  or other  successors  in interest  who  receive  shares in non-sale
transactions, as the "selling stockholders." If they sell all of these shares in
this offering,  the selling stockholders will beneficially own the shares of our
Common Stock as shown below.

         The following table sets forth the following  information  with respect
to each selling  stockholder  as of March 31,  2003:  (i) name and nature of any
position or other  relationship  with us within the past three  years;  (ii) the
number and  percentage  of total  outstanding  shares of our  Common  Stock each
selling stockholder  beneficially owns before this offering; (iii) the number of
shares of Common Stock the selling stockholder is offering;  and (iv) the number
and percentage of total outstanding  shares of our Common Stock that the selling
stockholder  will own after the selling  stockholder  sells all of the shares in
this offering.



                                                                                                      Percentage of
                                               Percentage of                                           Outstanding
                           Amount and           Outstanding                          Amount and         Shares of
                            Nature of            Shares of                           Nature of         Common Stock
                           Beneficial          Common Stock         Shares of        Beneficial        Beneficially
 Name and Address           Ownership          Beneficially          Common          Ownership         Owned After
of Beneficial Owner        Before the          Owned Before           Stock          After the         the Offering
                            Offering           the Offering          Offered          Offering
---------------------    -----------------    -----------------    -----------     ---------------    ---------------

GEF Optical Investment
                                                                                      
  Company, LLC ("GEF")(1)   1,464,866               16.4          1,000,000            464,866             5.2
Global Environment
   Strategic Technology
   Partners, LLC
   ("GESTP")(1)               166,666                1.9            166,666                  0             *
Caroline S. Pisano(2)         408,000                4.6            400,000              8,000             *
James A. Katra(3)             470,571                5.3            437,602             32,969             *
David W. Morsberger(4)        231,189                2.6            231,189                250             *
Robert J. Hilton(5)           214,758                2.4            214,758                  0             0
Jeffery M. Brown(6)           171,392                1.9            171,392                  0             0
Richard E. Krauss, Jr..(7)     14,857                *               14,857                  0             0
Richard B. Taber, Jr.(8)       18,571                *               18,571                  0             0
Robert F. Welte(8)              9,360                *                9,360                  0             0
Lawrence H. Young, Jr.(8)       4,457                *                4,457                  0             0
Mark G. Froehly(8)              1,634                *                1,634                  0             0
Anthony F. Zaukus, Jr.(8)         743                *                  743                  0             0
Mark D. Nichols(8)                594                *                  594                  0             0


*Less than 1%

     (1)  Includes  118,200 shares  beneficially  owned by Global  Environmental
          Capital,  LLC. ("GECC"),  an affiliated  entity.  Does not include the
          166,666  shares  listed in the table as owned by GESTP  over which GEF
          may  have or share  beneficial  ownership.  H.  Jeffrey  Leonard,  the
          Chairman of the Board of Essex,  is a director of the managing  member
          of GEF.  Marie S. Minton,  a director of Essex,  is also a director of
          the managing  member of GEF. The Company has been advised that each of
          GEF,  GECC,  GESTP,  Mr.  Leonard  and Ms.  Minton  may be deemed  the
          beneficial owner of all the shares of common stock  beneficially owned
          by GEF,  GECC and GESTP.

     (2)  Caroline S. Pisano is Vice President of Finance and General Counsel of
          the Company. She is the sister-in-law of Mr. Leonard (footnote 1).

                                       19



     (3)  Prior to its  acquisition  by  Essex,  Mr.  Katra was  Executive  Vice
          President and Chief  Financial  Officer and a founding  shareholder of
          our wholly-owned  subsidiary SDL and is currently  employed by SDL. Of
          the shares shown as  beneficially  owned,  30,969 are owned jointly by
          Mr. Katra and his spouse.

     (4)  Prior to its acquisition by Essex, Mr.  Morsberger was Chief Technical
          Officer and a founding shareholder of our wholly-owned subsidiary SDL,
          and is currently  employed by SDL. Of the shares shown as beneficially
          owned, 250 are owned by Mr. Morsberger's spouse.

     (5)  Prior to its acquisition by Essex, Mr. Hilton was a Vice President and
          a founding  shareholder  of our  wholly-owned  subsidiary  SDL, and is
          currently employed by SDL.

     (6)  Prior to its acquisition by Essex,  Mr. Brown was a Vice President and
          Corporate  Secretary and a founding  shareholder  of our  wholly-owned
          subsidiary SDL, and is currently employed by SDL.
     (7)  Prior to its  acquisition  by Essex,  Mr.  Krauss was President of our
          wholly-owned subsidiary SDL, and is currently employed by
         SDL

     (8)  Employees of SDL




                                       20




                              PLAN OF DISTRIBUTION

         The Common Stock being offered by the selling  stockholders may be sold
in transactions on the OTC Bulletin Board, on another market on which the Common
Stock may be trading, or in privately-negotiated transactions. The sale price to
the public  may be the  market  price  prevailing  at the time of sale,  a price
related  to  the  prevailing  market  price  or  any  other  price  the  selling
stockholders may determine. The Common Stock may also be sold under SEC Rule 144
and not under this prospectus.  The selling stockholders have the discretion not
to accept any  purchase  offer or make any sale of Common Stock if they deem the
purchase price to be unsatisfactory at any particular time, or for any reason.

         The selling  stockholders  may also sell the Common  Stock  directly to
broker-dealers  acting as principals and/or to  broker-dealers  acting as agents
for  themselves  or their  customers.  Brokers  acting as agents for the selling
stockholders  will  receive  usual  and  customary   commissions  for  brokerage
transactions,  and broker-dealers  acting as principals will do so for their own
account at  negotiated  prices and at their own risk.  It is  possible  that the
selling stockholders will sell shares of Common Stock to broker-dealers or other
purchasers  at a price per share  which may be below the then market  price.  In
addition,  the selling  stockholders  may enter into hedging  transactions  with
broker-dealers  who may engage in short  sales of Common  Stock in the course of
hedging  the  positions  they  assume  with a selling  stockholder.  The selling
stockholders  also may sell  shares  short and  deliver  the shares to close out
their positions,  and may loan or pledge their shares to a broker-dealer who may
have the right to sell the loaned or pledged shares on default or otherwise. The
selling stockholders and any brokers, dealers or agents, upon effecting the sale
of any of the Common Stock offered hereby, may be deemed  "underwriters" as that
term is defined under the  Securities  Act or the Exchange Act, or the rules and
regulations thereunder.

         The selling  stockholders  and any other persons  participating  in the
sale  or  distribution  of the  Common  Stock  will  be  subject  to  applicable
provisions  of the Exchange Act and its rules and  regulations,  which may limit
the  timing of  purchases  and sales of any of the Common  Stock by the  selling
stockholders or other distribution participants.  Furthermore,  under Regulation
M,  persons  engaged  in  a  distribution  of  securities  are  prohibited  from
simultaneously  engaging in market making and other  activities  with respect to
such  securities  for a  specified  period of time  before the  commencement  of
distributions subject to specified exceptions or exemptions. This may affect the
marketability  of the Common  Stock.  The  Company is aware of the  restrictions
imposed by  Regulation  M during  distributions  of  securities  by the  selling
stockholders.  The Company also has advised each of the selling  stockholders of
their duties and  obligations to comply with Regulation M and has requested that
each selling  stockholder and its affiliated  purchasers,  if any,  refrain from
bidding for or purchasing or inducing others to bid for or purchase common stock
during the five day restricted  period in connection with any  "distribution" of
common stock by such selling stockholders.

         We have agreed to  indemnify  the  selling  stockholders  against  some
important  liabilities,  including  liabilities  under the Securities Act, or to
contribute to any payments these selling stockholders may be required to make in
respect of these  liabilities.  We are paying the costs of this registration for
the selling stockholders.

                                       21




                                  LEGAL MATTERS

         The legal  issuance  and fully  paid and  non-assessable  status of our
Common  Stock  offered by this  prospectus  was passed  upon for us by our legal
counsel,  Whiteford,  Taylor & Preston L.L.P.,  Baltimore,  Maryland.  Counsel's
opinion is included as exhibit 5.1 to the  registration  statement of which this
prospectus is a part.

                                     EXPERTS

         The financial  statements  incorporated in this prospectus by reference
to our Annual  Report on Form 10-KSB for the year ended  December  29, 2002 have
been so incorporated in reliance on the report of Stegman & Company, independent
accountants,  given on the  authority  of said firm as experts in  auditing  and
accounting.

         The historical financial statements of SDL as of September 30, 2002 and
for each of the two years in the period ended September 30, 2002 incorporated in
this  prospectus  by reference to our Current  Report on Form 8-K filed on April
17,  2003,  as amended by the Form 8-K/A  filed on June 10,  2003,  have been so
incorporated  in  reliance  on the  report  of  Stegman &  Company,  independent
accountants,  given on the  authority  of said firm as experts in  auditing  and
accounting.

                                       22





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                                TABLE OF CONTENTS

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                                                              PAGE
                                                            --------

      Where You Can Find More
        Information............................................  3
      Forward Looking Statements...............................  4
      Essex Corporation........................................  4
      Summary Financial Information............................  5
      The Offering.............................................  6
      Recent Developments......................................  6
      Risk Factors.............................................  7
      Our Products and Services................................ 17
      Use of Proceeds.......................................... 17
      Selling Stockholders..................................... 19
      Plan of Distribution..................................... 21
      Legal Matters............................................ 22
      Experts.................................................. 22


             ------------------------------------------------------
             ------------------------------------------------------


                                ESSEX CORPORATION

                                  Common Stock
                            ------------------------
                                   PROSPECTUS
                            ------------------------
                                     , 2003

             ------------------------------------------------------
             ------------------------------------------------------




                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following table sets forth the fees and expenses in connection with
the issuance and distribution of the securities being registered. Except for the
SEC registration fee, all amounts are estimates.





                                                         
SEC registration fee....................................... $         735
Accounting fees and expenses...............................         4,000
Legal fees and expenses....................................        12,500
Blue Sky fees and expenses (including counsel fees)........         2,500
Printing expenses..........................................           500
Transfer agent's and registrar's fees and expenses.........           500
Miscellaneous expenses.....................................           200
                                                            -------------

  Total.................................................... $      20,935

                                                            ==============


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         The Virginia Stock Corporation Act ("Act") permits  indemnification  of
directors and officers of a corporation under certain  conditions and subject to
certain  limitations.  Articles (h) and (i) of Essex's Articles of Incorporation
contain  provisions for the  indemnification  of directors and officers of Essex
within the limitations permitted by the Act. In addition, Essex has entered into
indemnity  agreements  with all of its directors and officers  which provide the
maximum indemnification allowed by the Act.

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

     (a) Exhibits:

EXHIBIT
NUMBER                     DESCRIPTION

4.1   Specimen Stock Certificate*
5.1   Opinion of Whiteford, Taylor & Preston L.L.P.**
23.1  Consent of Independent Accountants
23.2  Consent of Independent Accountants
23.3  Consent of Whiteford, Taylor & Preston L.L.P. (included in Exhibit 5.1)**
24.1  Power of Attorney**
99.1  Securities Purchase Agreement dated March 15, 2001*



99.2  Amendment No. 2 to Registration Rights Agreement dated March 15, 2001*
99.3  Securities Purchase Agreement dated December 14, 2000*
99.4  Amendment No. 1 to Registration Rights Agreement dated December 4, 2000*
99.5  Securities Purchase Agreement dated September 7, 2000 among the Company,
      Global Optical Investment Company, LLC and Networking Ventures LLC. ***
99.6  Registration Rights Agreement dated September 7, 2000 among the Company,
      Global Optical Investment Company, LLC and Networking Ventures LLC***
99.7  Agreement and Plan of Merger among Essex Corporation, SDL Acquisition,
      Inc., Sensys Development Laboratories, Inc, and the Principal
      Shareholders dated as of February 21, 2003****
99.8  Registration Rights Agreement dated as of February 28, 2003 between
      Essex Corporation and Sensys Development Laboratories, Inc. Shareholders**
-----------------------
*     Incorporated by reference from the similarly numbered exhibit in the
Company's Registration Statement on Form S-2 (333-61200).
**    Previously filed.
***   Incorporated  by reference from Exhibit 99 to the Company's Form 8-K filed
September  20, 2000.
****  Incorporated  by  reference  from Exhibit 2.1 to the Company's Form 8-K
filed March 7, 2003 .

     (b) Financial Statement Schedules.

         None.

ITEM 17.  UNDERTAKINGS.

         (a) The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
                  being made, a  post-effective  amendment to this  registration
                  statement:

                           (i) To include  any  prospectus  required  by Section
                  10(a)(3) of the Securities Act of 1933.

                           (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of the registration statement
                  (or  the  most   recent   post-effective   amendment   to  the
                  registration  statement)  which,  individually  or when viewed
                  together,  represent a fundamental  change in the  information
                  set forth in the registration  statement.  Notwithstanding the
                  foregoing,  any  increase or decrease in volume of  securities
                  offered (if the total dollar value of securities offered would



                  not exceed that which was  registered)  and any deviation from
                  the low or high end of the estimated  maximum  offering  range
                  may be  reflected  in the form of  prospectus  filed  with the
                  Commission  pursuant to Rule 424(b) if, in the aggregate,  the
                  changes  in  volume  and  price  represent  no more than a 20%
                  change in the maximum  aggregate  offering  price set forth in
                  the  "Calculation of Registration  Fee" table in the effective
                  registration statement.

                           (iii)  To  include  any  material   information  with
                  respect to the plan of distribution  not previously  disclosed
                  in the  registration  statement or any material  change to the
                  information in the registration statement.  Provided, however,
                  that  paragraphs  (a)(1)(i) and (a)(1)(ii) do not apply if the
                  registration  statement  is on Form S-3 or Form  S-8,  and the
                  information  required  to  be  included  in  a  post-effective
                  amendment by those paragraphs is contained in periodic reports
                  filed by the  registrant  pursuant  to  Section  13 or Section
                  15(d) of the  Securities  and  Exchange  Act of 1934  that are
                  incorporated by reference in the registration statement.

                  (2) That, for the purpose of determining  any liability  under
         the Securities Act, each of these  post-effective  amendments  shall be
         deemed to be a new  registration  statement  relating to the securities
         being offered,  and the offering of those securities at that time shall
         be deemed to be their initial bona fide offering.

                  (3) To remove from  registration by means of a  post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.

         (b) The undersigned  Registrant hereby undertakes that, for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities  being offered,  and the offering of those securities
at that time shall be deemed to be their initial bona fide offering.

         (c)  Insofar as  directors,  officers  and  controlling  persons of the
Registrant are permitted to seek  indemnification  for liabilities arising under
the Securities Act, under the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange  Commission,
this indemnification is against public policy as expressed in the Securities Act
and is,  therefore,  unenforceable.  In the event  that a  director,  officer or
controlling  person asserts a claim for  indemnification  against these types of
liabilities in connection with the securities being  registered,  other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling  person of the Registrant in the  successful  defense of any action,
suit or proceeding,  the Registrant  will,  unless in the opinion of its counsel
the  matter  has been  settled by  controlling  precedent,  submit to a court of
appropriate  jurisdiction the question whether indemnification by it under these
circumstances  is against  public policy as expressed in the  Securities Act and
will be governed by the final adjudication of the issue.



                                   SIGNATURES

         Pursuant to the  requirements  of the  Securities  Act, the  Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-2 and has  duly  caused  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the County of Howard, State of Maryland, on July 18, 2003.

                                     ESSEX CORPORATION


                                     By: /S/ LEONARD E. MOODISPAW
                                     ----------------------------------------
                                         Leonard E. Moodispaw
                                         President and Chief Executive Officer







         Pursuant to the  requirements of the Securities Act, this  Registration
Statement has been signed by the following  persons in the capacities and on the
dates indicated.

SIGNATURE                                   TITLE                         DATE

/S/ H. JEFFREY LEONARD*             Chairman of the Board         July 18, 2003
----------------------------
H. Jeffrey Leonard


/S/ LEONARD E. MOODISPAW            President, Chief Executive    July 18, 2003
---------------------------         Officer, and Director
Leonard E. Moodispaw                (principal executive officer)


/S/ JOSEPH R. KURRY, JR.            Chief Financial Officer       July 18, 2003
---------------------------         (principal financial and
Joseph R. Kurry, Jr.                accounting officer)


/S/ JOHN G. HANNON*                 Director                      July 18, 2003
---------------------------
John G. Hannon


/S/ ROBERT W. HICKS*                Director                      July 18, 2003
---------------------------
Robert W. Hicks


/S/ RAY M. KEELER *                 Director                      July 18, 2003
---------------------------
Ray M. Keeler

/S/ FRANK E. MANNING*               Director                      July 18, 2003
---------------------------
Frank E. Manning


/S/ MARIE S. MINTON*                Director                      July 18, 2003
---------------------------
Marie S. Minton


/S/ ATHUR L. MONEY*                 Director                      July 18, 2003
---------------------------
Arthur L. Money


/S/ TERRY M. TURPIN*                Director                      July 18, 2003
---------------------------
Terry M. Turpin


*  pursuant  to a power of  attorney  dated  April  29,  2003  filed  with  this
Registration Statement (No. 333-104819)