ESSEX CORPORATION
SC 13D, 2000-09-18
ENGINEERING SERVICES
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CUSIP No. 296744 10 5                        13D                    Page 1 of 74

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

                                  SCHEDULE 13D*
                                 (Rule 13d-101)

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
           13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(a)

                                Essex Corporation
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                  296744 10 5
                                 (CUSIP Number)

                                James P. Gregory
           1225 Eye Street, N.W., Washington, DC 20005 (202) 789-4500
                  (Name, address and telephone number of person
                authorized to receive notices and communications)

                                September 8, 2000
             (Date of event which requires filing of this statement)


          If the filing person has previously  filed a statement on Schedule 13G
to report the  acquisition  which is the subject of this  Schedule  13D,  and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g),  check the
following box [ ].

          NOTE:  Schedules filed in paper format shall include a signed original
and five copies of the  schedule,  including  all  exhibits.  See Rule 13d-7 for
other parties to whom copies are to be sent.

                         (Continued on following pages)

----------------
          *The  remainder of this cover page shall be filled out for a Reporting
Person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

          The information required in the remainder of this cover page shall not
be deemed to be "filed" for  purposes of Section 18 of the  Securities  Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes)

<PAGE>

CUSIP No. 296744 10 5                        13D                    Page 2 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)
                                                          GEF Optical Investment
                                                          Company, LLC
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             WC

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                  Delaware

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           -0-
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           -0-
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   1,000,000

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)
                   18.53%

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                      OO

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 296744 10 5                        13D                    Page 3 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)

                                                     H. Jeffrey Leonard
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             NOT APPLICABLE

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                USA

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           -0-
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           -0-
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   1,000,000

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)
                   18.53%

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                      IN

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>

CUSIP No. 296744 10 5                     13D                       Page 4 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)

                                                      Marie S. Minton
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             NOT APPLICABLE

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                  USA

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           -0-
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           -0-
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   1,000,000

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)
                   18.53%

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                      IN

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 296744 10 5                     13D                    Page 5 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)

                                                       James P. Gregory
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             NOT APPLICABLE

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                  USA

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           -0-
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           -0-
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   1,000,000

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)
                   18.53%

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                      IN

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 296744 10 5                     13D                       Page 6 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)
                                               Networking Ventures, LLC
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             WC

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
             Maryland

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           -0-
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           -0-
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   1,000,000

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)
                   18.53%

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                      OO

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


CUSIP No. 296744 10 5                     13D                       Page 7 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)

                                                         John G. Hannon
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             PF

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                  USA

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           6,800
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           6,800
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           500,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON
                   506,800

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

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

  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                     IN

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 296744 10 5                     13D                       Page 8 of 74

--------------------------------------------------------------------------------
  (1)  NAME OF REPORTING PERSONS
       I.R.S. IDENTIFICATION NOS.
       OF ABOVE PERSONS (ENTITIES ONLY)

                                                     Caroline  S. Pisano
--------------------------------------------------------------------------------
  (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                              (a)  [ ]
                              (b)  [X]
--------------------------------------------------------------------------------
  (3)  SEC USE ONLY

--------------------------------------------------------------------------------
  (4)  SOURCE OF FUNDS **
             PF

--------------------------------------------------------------------------------
  (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
       REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)                        [ ]

--------------------------------------------------------------------------------
  (6)  CITIZENSHIP OR PLACE OF ORGANIZATION
                  USA

--------------------------------------------------------------------------------
NUMBER OF          (7)  SOLE VOTING POWER
                           6,000
SHARES             -------------------------------------------------------------

BENEFICIALLY       (8)  SHARED VOTING POWER
                           1,000,000
OWNED BY
                   -------------------------------------------------------------
EACH               (9)  SOLE DISPOSITIVE POWER
                           6,000
REPORTING
                   -------------------------------------------------------------

PERSON WITH        (10) SHARED DISPOSITIVE POWER
                           506,000

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

  (11) AGGREGATE AMOUNT BENEFICIALLY OWNED
       BY EACH REPORTING PERSON

--------------------------------------------------------------------------------
  (12) CHECK BOX IF THE AGGREGATE AMOUNT
       IN ROW (11) EXCLUDES CERTAIN SHARES **                       [ ]

--------------------------------------------------------------------------------
  (13) PERCENT OF CLASS REPRESENTED
       BY AMOUNT IN ROW (11)

--------------------------------------------------------------------------------
  (14) TYPE OF REPORTING PERSON **
                 IN

-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 296744 10 5                     13D                       Page 9 of 74

Item 1.    Security and Issuer.

          This  statement  relates to the Common Stock (the  "Common  Stock") of
Essex Corporation,  a Virginia corporation (the "Company"), and shares of Common
Stock  issuable upon the conversion of Series B Convertible  Preferred  Stock of
the Company (the  "Preferred  Stock",  and together with the Common  Stock,  the
"Stock"). The Company's principal executive offices are located at 9150 Guilford
Road, Columbia, MD 21046.

Item 2.    Identity and Background.

          (a) This statement is filed by:

              (i)    GEF  Optical   Investment   Company,   a  Delaware  limited
                     liability  company  ("GEF"),  with respect to the shares of
                     Stock directly owned by it;
              (ii)   H.  Jeffrey  Leonard  ("Mr.  Leonard"),  who  serves  as  a
                     director of the managing member of GEF, with respect to the
                     shares of Stock directly owned by GEF;
              (iii)  Marie S. Minton ("Ms. Minton"), who serves as a director of
                     the managing  member of GEF,  with respect to the shares of
                     Stock directly owned by GEF;
              (iv)   James P. Gregory ("Mr. Gregory"),  who serves as a director
                     of the  managing  member of GEF,  with respect to shares of
                     Stock directly owned by GEF;
              (v)    Networking  Ventures,  LLC,  a Maryland  limited  liability
                     company  ("NV"),  with  respect  to  the  shares  of  Stock
                     directly owned by it;
              (vi)   John G. Hannon ("Mr. Hannon"),  who is a managing member of
                     NV, with respect to the shares of Stock  directly  owned by
                     NV and 6,800 shares of Common Stock  directly  owned by Mr.
                     Hannon; and
              (vii)  Caroline S. Pisano ("Ms. Pisano"), who serves as a managing
                     member of NV, with respect to the shares of Stock  directly
                     owned by NV and 6,000 shares of Common Stock directly owned
                     by Ms. Pisano.

          The foregoing persons are hereinafter sometimes  collectively referred
to as the  Reporting  Persons".  All  disclosures  herein  with  respect  to any
Reporting Person are made only by such Reporting Person.  Any disclosures herein
with respect to persons other than the Reporting Persons are made on information
and belief after making inquiry to the appropriate party.

          (b) The address of the principal business and principal office of GEF,
Mr.  Leonard,  Ms. Minton and Mr. Gregory is 1225 Eye Street,  N.W.,  Suite 900,
Washington, DC 20005. The address of the principal business and principal office
of NV, Mr. Hannon and Ms. Pisano is 8970 Route 108, Columbia, Maryland 21045.

          (c) The  principal  business  of each  of GEF and NV is  serving  as a
private  investment  fund.  Mr.  Leonard,  Ms.  Minton and Mr.  Gregory serve as
directors of the  managing  member of GEF.  Mr.  Hannon and Ms.  Pisano serve as
managing members of NV.

          (d) None of the  Reporting  Persons  has,  during the last five years,
been convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors).

          (e) None of the  Reporting  Persons  has,  during the last five years,
been a party to a civil  proceeding  of a  judicial  or  administrative  body of
competent  jurisdiction and, as a result of such proceeding,  was, or is subject
to, a  judgment,  decree  or final  order  enjoining  future  violations  of, or
prohibiting or mandating activities subject to, Federal or State securities laws
or finding any violation with respect to such laws.

          (f) GEF is a  Delaware  limited  liability  company.  NV is a Maryland
limited liability company.  Mr. Leonard, Ms. Minton, Mr. Gregory, Mr. Hannon and
Ms. Hannon are each United States citizens.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 10 of 74

Item 3.    Source and Amount of Funds and Other Consideration.

          On September 8, 2000,  each of GEF and NV acquired  125,000  shares of
Preferred  Stock from the Company  pursuant to a Securities  Purchase  Agreement
dated as of September 7, 2000 (the "Purchase Agreement"). A form of the Purchase
Agreement  is  attached  hereto  as  Exhibit  1 and is  incorporated  herein  by
reference.  Each share of  Preferred  Stock is  convertible  into four shares of
Common Stock, subject to adjustment for stock splits, Common Stock dividends and
other  recapitalizations  and  reorganizations.   The  purchase  price  for  the
Preferred  Stock  was  $4.00  per  share,  for an  aggregate  purchase  price of
$1,000,000.  In  addition,  each of GEF and NV  received  Warrants  to  purchase
1,000,000  shares of Common  Stock  (the  "Warrants"),  exercisable  only on the
conditions described below in Item 6 - Contracts,  Arrangements,  Understandings
or Relationships with respect to Securities of the Issuer. A form of the Warrant
is  attached  hereto as  Exhibit 2. Each of GEF and NV  purchased  the shares of
Preferred Stock using their respective  working  capital.  On September 8, 2000,
Mr. Hannon  purchased 4,800 shares of Common Stock at a price of $2.49 per share
and Ms.  Pisano  purchased  6,000 shares of Common Stock at a price of $2.50 per
share.  On September 13, 2000, Mr. Hannon  purchased 2000 shares of Common Stock
at a price of $4.8125 per share.  These  purchases were made in the open market,
using personal funds of such Reporting Persons.

Item 4.    Purpose of the Transaction.

          The purpose of the acquisition of the Preferred Stock by the Reporting
Persons was for investment and to give the Reporting Persons certain  management
rights for purposes of maximizing  the long-term  value of the Company.  Each of
GEF and NV has  agreed  on the  terms  provided  in the  Purchase  Agreement  to
purchase an additional 125,000 shares of Preferred Stock at a price of $4.00 per
share in  quarterly  installments  of 31,250  shares each on December  15, 2000,
March 15, 2001,  June 15, 2001 and September 15, 2001.  The holders of Preferred
Stock  are  entitled  to such  number  of  votes as  shall  entitle  them in the
aggregate to 51% of the total voting power of the capital  stock of the Company,
except that the holders of Preferred Stock shall only have the right to one vote
for each share of Common  Stock into which  such  holders'  shares of  Preferred
Stock are convertible in the case of a vote with respect to (i) a sale of all or
substantially  all of the assets of the Company which values the Company at less
than  $50,000,000  or (ii) a merger  transaction  in which the  Company is to be
acquired  which  values the Company at less than  $50,000,000.  In  addition,  a
holder of  Preferred  Stock shall only be entitled to one vote for each share of
Common Stock into which such holder's  shares of Preferred Stock are convertible
if the  holders  of  Preferred  Stock  default  on their  obligations  under the
Purchase Agreement to purchase additional Preferred Stock. So long as GEF and NV
have the 51%  voting  rights to which they are  entitled  under the terms of the
Preferred  Stock,  they have agreed to vote any shares of Common  Stock owned by
them in the same  proportions  as shares of Common  Stock are voted by the other
holders of Common  Stock.  Transfer of the  Preferred  Stock may only be made to
affiliates  of GEF and NV. In  connection  with the  purchase  of the  Preferred
Stock,  Mr.  Leonard,  Mr.  Hannon and Ms.  Pisano were  elected to the Board of
Directors of the Company and now comprise three of the Company's nine directors.
The Purchase Agreement also provides that GEF and NV may at any time request the
Company  to  convene a meeting  of  shareholders  for the  purpose  of  electing
designees of GEF and NV to fill a majority of the seats of the  Company's  Board
of  Directors.  The  Reporting  Persons  anticipate

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 11 of 74

that they will make such a request in connection  with the Company's next annual
meeting of shareholders.  If not sooner converted,  the Preferred Stock shall be
automatically  converted to Common Stock on September 8, 2002, at which time the
51% voting rights of the holders of Preferred  Stock described above would cease
to be effective. The Reporting Persons reserve the right to acquire, or cause to
be acquired, additional securities of the Company, to dispose of, or cause to be
disposed of, such securities at any time or to formulate  other purposes,  plans
or  proposals  regarding  the  Company or any of its  securities,  to the extent
deemed  advisable  in light of general  investment  and trading  policies of the
Reporting Persons, market conditions or other factors.

Item 5.    Interest in Securities of the Issuer.

         (a)  Each of GEF, Mr. Leonard,  Ms. Minton, Mr. Gregory, NV, Mr. Hannon
              and Ms.  Pisano may be deemed the  beneficial  owner of  1,000,000
              shares of Common  Stock.  This amount is  calculated  based on the
              number of shares of Common Stock  issuable upon  conversion of the
              125,000 shares of Preferred  Stock held for the account of GEF and
              the 125,000 shares of Preferred  Stock held for the account of NV.
              This amount does not include any shares  issuable upon exercise of
              the Warrants since it cannot currently be determined  whether such
              Warrants are  exercisable  within 60 days. See Item 6 - Contracts,
              Arrangements,  Understandings  or  Relationships  with  Respect to
              Securities  of the Issuer.  The  1,000,000  shares of Common Stock
              comprise  approximately  18.53% of the  total  number of shares of
              Common Stock outstanding based on the Company's  representation in
              the  Purchase  Agreement  that it has  4,397,861  shares of Common
              Stock  outstanding  and its  reservation  of  1,000,000  shares of
              Common Stock for issuance upon conversion of the Preferred  Stock.
              Mr. Leonard,  Ms. Minton,  Mr. Gregory,  Mr. Hannon and Ms. Pisano
              disclaim beneficial ownership of such shares.

         (b)  (i) GEF, NV and the other Reporting  Persons may be deemed to have
              shared  voting power with respect to the  1,000,000  shares deemed
              beneficially  held for the  account of GEF and NV by virtue of the
              provisions of a Shareholders  Voting Agreement  between GEF and NV
              providing  for certain  voting  arrangements  with respect to such
              shares.  A copy of the  Shareholders  Voting Agreement is attached
              hereto as Exhibit 3.

              (ii) GEF, Mr. Leonard, Ms. Minton and Mr. Gregory may be deemed to
              have the sole power to direct disposition of the 500,000 shares of
              Common Stock  issuable upon  conversion  of the 125,000  shares of
              Preferred Stock held for the account of GEF.

              (iii) NV, Mr. Hannon and Ms. Pisano may be deemed to have the sole
              power to direct the  disposition  of the 500,000  shares of Common
              Stock issuable upon  conversion of the 125,000 shares of Preferred
              Stock held for the account of NV.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 12 of 74

              (iv) In addition to their  interests  described above in this Item
              5, Mr.  Hannon and Ms. Pisano have sole voting  disposition  power
              with respect to the 6,800 shares and 6,000 shares of Common Stock,
              respectively held by them.

         (c)  Except as  described  herein,  none of the  Reporting  Persons has
              effected  any  transaction  in the Common Stock during the past 60
              days.

         (d)  The members of GEF have the right to participate in the receipt of
              dividends  from,  or proceeds  from the sale of, the stock held by
              GEF in  accordance  with their  membership  interests  in GEF. The
              members  of NV have the right to  participate  in the  receipt  of
              dividends from, or proceeds from the sale of, the stock held by NV
              in accordance with their membership interests in NV.

         (e)  Not applicable.

Item 6.    Contracts, Arrangements, Understandings or
           Relationships with Respect to Securities of the Issuer.

         The Purchase Agreement provides for the purchase of the Preferred Stock
by GEF and NV and the issuance of the Warrants to GEF and NV. Under the Purchase
Agreement,  GEF and NV each purchased  125,000 shares of Preferred  Stock at the
initial closing and have agreed on the terms set forth in the Purchase Agreement
to purchase an additional  125,000  shares of Preferred  Stock in four quarterly
installments  thereafter.   The  Company  makes  customary  representations  and
warranties  to GEF and NV and has  agreed as soon as  practicable  to secure the
listing on the Nasdaq Stock Market of the shares of Common Stock  issuable  upon
conversion of the Preferred Stock and exercise of the Warrants.

         In  connection   with  the  execution  and  delivery  of  the  Purchase
Agreement,  the  Company  approved  Articles  of  Amendment  of its  Articles of
Incorporation,  which set forth the terms of the Preferred Stock,  including the
provisions  concerning  voting rights described above. A copy of the Articles of
Amendment is attached hereto as Exhibit 4.

         Each  Warrant is  exercisable  to purchase an  aggregate  of  1,000,000
shares at a  purchase  price of $.001 per  share.  Such  Warrants  shall only be
exercisable,  however,  as follows:  If the market value of the Common Stock for
five consecutive  trading days, with aggregate volume on the market on which the
Common  Stock is  traded  for such  five  consecutive  trading  days of at least
100,000  shares,  exceeds the amount set forth  below  under the heading  "Share
Price",  the Warrant  shall be  exercisable  to purchase the number of shares of
Common Stock set forth below under the heading "Cumulative Shares Exercisable".

    --------------------------------------------------------------------
     Share Price                   Cumulative Shares Exercisable
    --------------------------------------------------------------------
       $10.00                               250,000
    --------------------------------------------------------------------
       $12.00                               375,000
    --------------------------------------------------------------------
       $14.00                               500,000
    --------------------------------------------------------------------
       $16.00                               625,000
    --------------------------------------------------------------------
       $18.00                               750,000
    --------------------------------------------------------------------
       $20.00                              1,000,000
    --------------------------------------------------------------------

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 13 of 74

         The Company,  GEF and NV have also entered into a  Registration  Rights
Agreement pursuant to which the Company has agreed to effect the registration of
Common Stock issuable upon conversion of the Preferred Stock and exercise of the
Warrants  (the  "Registrable  Shares") on two  occasions  after June 30, 2001 if
requested by the holders of at least 51% of the Registrable Shares. In addition,
the  Company  has  agreed  to  effect  registration  of such  shares on Form S-3
provided  such  registration  is not  requested  more than once in any  12-month
period.  The  Company  has also  agreed to allow the  holders of such  shares to
participate in  registrations of shares which the Company may initiate from time
to time.  A copy of the  Registration  Rights  Agreement  is attached  hereto as
Exhibit 5.

         GEF and NV have also entered into a Shareholders Voting Agreement. This
agreement  provides  that until  September  8, 2002 each party will vote for the
designees  of the other at all  elections  of directors of the Company and shall
consult  with the other and vote as may be  mutually  agreed by the  parties  in
connection  with other matters to be voted on by the Company's  shareholders  or
directors.

         Additionally,   the  Reporting   Persons  have  entered  into  a  Joint
Acquisition Statement attached as Exhibit 6 hereto, as required by Rule 13d-1(k)
under the Securities Exchange Act of 1934, as amended.

Item 7.    Materials to be Filed as Exhibits.

         There is filed herewith the following Exhibits:

         Exhibit 1 - Securities  Purchase Exchange Agreement dated September  7,
                     2000 among the Company, GEF and NV.

         Exhibit 2 - Form of Common Stock  Warrant  issued to each of GEF and NV
                     by the Company on September 8, 2000.

         Exhibit 3 - Shareholders  Voting   Agreement  dated  September  8, 2000
                     between GEF and NV.

         Exhibit 4 - Articles of Amendment of Articles of  Incorporation  of the
                     Company, containing terms of Preferred Stock.

         Exhibit 5 - Registration Rights Agreement dated September 7, 2000 among
                     the Company, GEF and NV.

         Exhibit 6 - A  written   agreement  relating  to the  filing  of  joint
                     acquisition  statements as required by  Rule 13d-1(k) under
                     the Securities Exchange Act of 1934, as amended.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 14 of 74

SIGNATURES

         After  reasonable  inquiry and to the best of our knowledge and belief,
the  undersigned  certify that the  information  set forth in this  statement is
true, complete and correct.

DATED:  September 15, 2000

GEF OPTICAL INVESTMENT COMPANY, LLC           NETWORKING VENTURES, LLC

By:   /s/  H. Jeffrey Leonard                 By:  /s/ John G. Hannon
      -----------------------------                -----------------------------
      H. Jeffrey Leonard, President                John G. Hannon, Member

H. JEFFREY LEONARD                            MARIE S. MINTON

   /s/  H. Jeffrey Leonard                       /s/  Marie S. Minton
-----------------------------------           ----------------------------------


JAMES P. GREGORY                              JOHN G. HANNON

   /s/  James P. Gregory                         /s/  John G. Hannon
-----------------------------------           ----------------------------------


CAROLINE S. PISANO

/s/Caroline S. Pisano
-----------------------------------


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 15 of 74

                                    EXHIBIT 1

                          SECURITIES PURCHASE AGREEMENT

         SECURITIES PURCHASE AGREEMENT (the "Agreement"),  dated as of September
7,  2000,  by  and  among  Essex  Corporation,  a  Virginia  corporation,   with
headquarters  located  at 9150  Guilford  Road,  Columbia,  Maryland  21046 (the
"Company"),  and the investors  listed on the Schedule of Buyers attached hereto
(individually, a "Buyer" and collectively, the "Buyers").

         WHEREAS:

         A. The  Company  and the  Buyers  are  executing  and  delivering  this
Agreement in reliance upon the exemption from securities  registration  afforded
by Rule 506 of Regulation D ("Regulation D") as promulgated by the United States
Securities and Exchange Commission (the "SEC") under the Securities Act of 1933,
as amended (the "1933 Act").

         B. The Company has  authorized the following new class of its Preferred
Stock ("Preferred  Stock"):  the Company's Series B Convertible  Preferred Stock
(the  "Series B  Preferred"),  which  shall be  convertible  into  shares of the
Company's  Common Stock,  (the "Common  Stock") (as converted,  the  "Conversion
Shares"),  in accordance with the terms of the Company's  Articles of Amendment,
in the form attached hereto as Exhibit A (the "Articles of Amendment").

         C. The Buyers wish to purchase, upon the terms and conditions stated in
this  Agreement,  an  aggregate  of 500,000  shares of Series B  Preferred  (the
"Shares") in the respective  amounts set forth opposite each Buyer's name on the
Schedule of Buyers.

         D. The Buyers wish to purchase,  on the terms and conditions  stated in
this  Agreement,  Warrants to purchase an aggregate  of 2,000,000  shares of the
Common Stock (the shares of Common Stock  issuable upon exercise of the Warrants
are referred to herein as the "Warrant Shares"), in accordance with the terms of
the form of  Warrant  attached  hereto  as  Exhibit  B (the  "Warrants")  in the
respective amounts set forth each Buyer's name on the Schedule of Buyers.

         E. Contemporaneously with the execution and delivery of this Agreement,
the parties hereto are executing and delivering a Registration  Rights Agreement
in the form attached hereto as Exhibit C (the  "Registration  Rights Agreement")
pursuant to which the Company has agreed to provide certain  registration rights
under the 1933 Act and the rules and  regulations  promulgated  thereunder,  and
applicable state securities laws.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 16 of 74

         NOW THEREFORE, the Company and the Buyers hereby agree as follows:

         1.       PURCHASE AND SALE OF SHARES; ISSUANCE OF WARRANTS.

                  (a) Purchase of Shares;  Issuance of Warrants.  At the Initial
Closing or a Subsequent  Closing,  as defined below, the Company shall issue and
sell to each Buyer and each Buyer severally  agrees to purchase from the Company
the  respective  number of Shares set forth  opposite  such  Buyer's name on the
Schedule of Buyers at such  Closing at a price of $4.00 per Share.  In addition,
the Company shall issue and sell to each Buyer at the Initial  Closing a Warrant
to purchase the number of shares of Common Stock set forth opposite such Buyer's
name on the Schedule of Buyers.

                  (b)  The  Initial   Closing.   The  initial   closing  of  the
transaction  contemplated hereby (the "Initial Closing") shall take place at the
offices of the Company,  9150 Guilford  Road,  Columbia,  Maryland 21046 at 9:00
a.m. on September 15, 2000 or such later date on which the conditions  specified
in Section 7 below have been satisfied or waived by the Buyers,  but in no event
later than October 15, 2000.  At the Initial  Closing,  (A) each Buyer shall pay
the  purchase  price to the Company for the Shares to be issued and sold to such
Buyer by check or wire  transfer,  and (B) the  Company  shall  deliver  to each
Buyer,   (1)  a  stock   certificate   (collectively,   the   "Preferred   Stock
Certificates")  representing  the number of the Shares  which such Buyer is then
purchasing  hereunder and (2) a Warrant for the number of shares of Common Stock
covered by  Warrants  indicated  with  respect to such Buyer on the  Schedule of
Buyers,  duly  executed on behalf of the Company and  registered  in the name of
such Buyer or its  designee.  If at the Initial  Closing  any of the  conditions
specified in Section 7 below have not been  fulfilled,  each of the Buyers shall
at its  election,  be relieved of all of its  obligations  under this  Agreement
without  thereby  waiving any other rights it may have by reason of such failure
or such non-fulfillment.

                  (c)   Subsequent   Closings.   Subsequent   closings   of  the
transaction  contemplated  hereby (the  "Subsequent  Closings") shall be held as
shown on the  Schedule of Buyers.  At each  Subsequent  Closing,  (A) each Buyer
shall pay the purchase price to the Company for the Shares to be issued and sold
at such Subsequent Closing to such Buyer by check or wire transfer,  and (B) the
Company shall deliver to each Buyer, a Preferred Stock Certificate  representing
the number of the Shares which such Buyer is then purchasing hereunder. If, at a
Subsequent  Closing,  a Buyer fails to purchase  the full number of Shares to be
purchased  by it at  such  Subsequent  Closing,  and  if  such  Buyer  does  not
thereafter  purchase  such  Shares  within 10 days after its  receipt of written
notice of such  failure,  such Buyer  shall no longer have the right to purchase
Shares at Subsequent Closings.

                  (d)  Acceleration.  If  elected  by  the  Company's  Board  of
Directors,  including all of the directors  appointed by the Buyers, the Company
may  accelerate  the  obligation  of the Buyers to purchase  the Shares they are
required to purchase at Subsequent  Closings.  In such event,  the Company shall
give at least 10 days written  notice to the Buyers of the date,  time and place
of the accelerated  closing,  including the number of Shares to be purchased and
the aggregate  purchase price  therefor.  At the accelerated  closing,  (A) each
Buyer  shall pay the  purchase  price to the Company for the Shares to be issued
and sold at such  closing to such Buyer by check or wire  transfer,  and (B) the
Company shall deliver to each Buyer, a Preferred Stock Certificate  representing
the number of the Shares which such Buyer is then purchasing hereunder.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 17 of 74

         2.       BUYERS' REPRESENTATIONS AND WARRANTIES.

                  Each Buyer represents and warrants with respect only to itself
that:

                  (a) Investment Purpose. Such Buyer (i) is acquiring the Shares
and Warrants being  purchased by it, (ii) upon  conversion of such Shares,  will
acquire the  Conversion  Shares then  issuable  and (iii) upon  exercise of such
Warrants,  will  acquire  the Warrant  Shares then  issuable  (the  Shares,  the
Conversion Shares and the Warrant Shares  collectively are referred to herein as
the  "Securities"),  for its own account for investment only and not with a view
towards,  or for resale in  connection  with,  the public  sale or  distribution
thereof,  except  pursuant to sales  registered or exempted  under the 1933 Act;
provided,  however,  that by making the representations  herein, such Buyer does
not agree to hold any of the  Securities  for any minimum or other specific term
and  reserves  the right to  dispose  of the  Securities  at any time,  provided
further,  however, that such disposition shall be in accordance with or pursuant
to a registration statement or an exemption under the 1933 Act.

                  (b) Accredited  Investor Status.  Such Buyer is an "accredited
investor" as that term is defined in Rule  501(a)(3)  of  Regulation D under the
1933 Act.

                  (c) Reliance on Exemptions.  Such Buyer  understands  that the
Securities  are being offered and sold to it in reliance on specific  exemptions
from the  registration  requirements  of the  United  States  federal  and state
securities  laws and that the  Company  is  relying  in part  upon the truth and
accuracy of, and such Buyer's compliance with, the representations,  warranties,
agreements, acknowledgments and understandings of such Buyer set forth herein in
order to determine the  availability  of such  exemptions and the eligibility of
such Buyer to acquire the Securities.

                  (d)  Information.  Such Buyer and its  advisors,  if any, have
been  furnished  with all  materials  relating  to the  business,  finances  and
operations  of the Company and  materials  relating to the offer and sale of the
Securities which have been requested by such Buyer. Such Buyer and its advisors,
if any,  have been  afforded the  opportunity  to ask  questions of the Company.
Neither such inquiries nor any other due diligence  investigations  conducted by
such Buyer or its advisors,  if any, or its representatives  shall modify, amend
or  affect  such  Buyer's  right to rely on the  Company's  representations  and
warranties contained in Sections 3 and 9(l) below.

                  (e) Residency.  Such Buyer is purchasing  the Securities  from
its office specified in its address on the Schedule of Buyers.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 18 of 74

         3.       REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

                  The  Company  represents  and  warrants  to each of the Buyers
that:

                  (a)  Organization  and  Qualification.  The  Company  and  its
"Subsidiaries"  (which for purposes of this Agreement  means any entity in which
the Company,  directly or  indirectly,  owns capital stock or holds an equity or
similar interest which ownership entitles the Company to elect a majority of the
board of directors or similar  governing  body of such entity) are  corporations
duly  organized  and  validly  existing in good  standing  under the laws of the
jurisdiction in which they are  incorporated,  and have the requisite  corporate
power and  authorization  to own their properties and to carry on their business
as now  being  conducted.  Each  of the  Company  and its  Subsidiaries  is duly
qualified as a foreign  corporation  to do business  and is in good  standing in
every  jurisdiction  in which its  ownership  of  property  or the nature of the
business  conducted  by it makes  such  qualification  necessary,  except to the
extent that the failure to be so qualified or be in good standing would not have
a Material Adverse Effect. As used in this Agreement,  "Material Adverse Effect"
means  any  material  adverse  effect  on  the  business,   properties,  assets,
operations, results of operations, or financial condition of the Company and its
Subsidiaries,  if any,  taken as a whole,  or on the  transactions  contemplated
hereby or by the  agreements  and  instruments  to be entered into in connection
herewith,  or on  the  authority  or  ability  of the  Company  to  perform  its
obligations  under the Transaction  Documents (as defined below) or the Articles
of  Amendment.  A complete  list of entities in which the  Company,  directly or
indirectly,  owns  capital  stock or holds an equity or similar  interest is set
forth on Schedule 3(a).

                  (b) Authorization;  Enforcement; Validity. The Company has the
requisite   corporate  power  and  authority  to  enter  into  and  perform  its
obligations  under  this  Agreement,   the  Warrants,  the  Registration  Rights
Agreement,  and each of the other agreements  entered into by the parties hereto
in   connection   with  the   transactions   contemplated   by  this   Agreement
(collectively,  the  "Transaction  Documents"),  and to issue the  Securities in
accordance with the terms hereof and thereof.  The execution and delivery of the
Transaction  Documents  by the  Company  and the  execution  and  filing  of the
Articles  of  Amendment  by  the  Company  and  the  consummation  by it of  the
transactions  contemplated hereby and thereby,  have been duly authorized by the
Company's Board of Directors and no further consent or authorization is required
by the  Company,  its Board of Directors or its  stockholders.  The  Transaction
Documents have been duly executed and delivered by the Company.  The Transaction
Documents   constitute  the  valid  and  binding   obligations  of  the  Company
enforceable  against the Company in accordance with their terms,  except as such
enforceability  may be  limited by general  principles  of equity or  applicable
bankruptcy,  insolvency or similar laws relating to, or affecting generally, the
enforcement of creditors' rights and remedies. The Articles of Amendment,  which
shall have been filed  prior to the  Initial  Closing  with the  Virginia  State
Corporation   Commission,   shall  thereafter  be  in  full  force  and  effect,
enforceable  against  the Company in  accordance  with their terms and shall not
have been amended.

                  (c)  Capitalization.  The  authorized  capital  stock  of  the
Company  consists of (i) 25,000,000  shares of Common Stock,  of which as of the
date hereof 4,397,861  shares are issued and  outstanding,  1,159,850 shares are
reserved for issuance pursuant to the Company's

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 19 of 74

stock option and purchase  plans,  and 439,868  shares are issuable and reserved
for issuance  pursuant to securities  (other than the Preferred Stock, and stock
option and purchase plans) exercisable or exchangeable for, or convertible into,
shares of Common Stock,  and (ii) 1,000,000  shares of Preferred Stock, of which
as of the date hereof,  2,500 shares are designated as Class A Preferred  Stock,
all of which is held in the Company's treasury and 500,000 shares are designated
as Series B  Preferred,  none of which are  issued or  outstanding.  All of such
outstanding  shares have been, or upon issuance will be,  validly issued and are
fully paid and  nonassessable.  Except as  disclosed  in Schedule  3(c),  (A) no
shares of the Company's  capital  stock are subject to preemptive  rights or any
other similar  rights  (arising  under  Virginia law, the Company's  Articles of
Incorporation  or By-laws or any agreement or instrument to which the Company is
a party) or any liens or  encumbrances  granted or created by the  Company;  (B)
there are no outstanding debt securities issued by the Company; (C) there are no
outstanding  options,   warrants,  scrip,  rights  to  subscribe  to,  calls  or
commitments  of any  character  whatsoever  relating to, or securities or rights
convertible  into,  any  shares of  capital  stock of the  Company or any of its
Subsidiaries, or contracts, commitments, understandings or arrangements by which
the  Company  or  any of  its  Subsidiaries  is or may  become  bound  to  issue
additional  shares of capital stock of the Company or any of its Subsidiaries or
options,  warrants,  scrip,  rights to subscribe to, calls or commitments of any
character  whatsoever relating to, or securities or rights convertible into, any
shares of capital stock of the Company or any of its Subsidiaries; (D) there are
no agreements or arrangements under which the Company or any of its Subsidiaries
is obligated to register the sale of any of their  securities under the 1933 Act
(except  the  Registration  Rights  Agreement);  (E)  there  are no  outstanding
securities  or  instruments  of the  Company  or any of its  Subsidiaries  which
contain  any  redemption  or  similar  provisions,  and there are no  contracts,
commitments,  understandings  or arrangements by which the Company or any of its
Subsidiaries  is or may become  bound to redeem a security of the Company or any
of its  Subsidiaries;  (F) there are no  securities  or  instruments  containing
anti-dilution  or similar  provisions  that will be triggered by the issuance of
the Securities as described in this Agreement; and (G) the Company does not have
any stock  appreciation  rights or "phantom  stock" plans or  agreements  or any
similar  plan or  agreement.  The Company has  furnished  to each Buyer true and
correct copies of the Company's Articles of Incorporation,  as amended and as in
effect on the date hereof  (the  "Articles  of  Incorporation"),  the  Company's
By-laws, as amended and as in effect on the date hereof (the "By-laws"), and the
terms of all securities  convertible  into or exercisable  or  exchangeable  for
Common Stock and the material rights of the holders thereof in respect thereto.

                  (d)  Issuance of  Securities.  The Shares are duly  authorized
and, upon issuance at the Closing at which they are issued, shall be (i) validly
issued,  fully  paid and  non-assessable,  (ii) free from all  taxes,  liens and
charges with respect to the  issuance  thereof and (iii)  entitled to the rights
and  preferences  set forth in the  Articles  of  Amendment.  As of the  Initial
Closing,  at least  2,000,000  shares of Common Stock  (subject to adjustment as
provided  in the  Articles  of  Amendment)  will have been duly  authorized  and
reserved for issuance  upon  conversion  of the Shares and  2,000,000  shares of
Common Stock  (subject to adjustment as provided in the Warrants) will have been
duly  authorized for issuance upon exercise of the Warrants.  Upon conversion in
accordance  with the Articles of Amendment  or issuance in  accordance  with the
Warrants, the Conversion Shares and the Warrant Shares, as the case may be, will
be validly issued,  fully paid and nonassessable and free from all taxes,  liens
and charges with respect to the issue  thereof,  with the holders being entitled
to all rights accorded to a holder of Common Stock.  The issuance by the Company
of the Securities is exempt from registration under the 1933 Act.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 20 of 74

                  (e) No Conflicts.  The execution,  delivery and performance of
the Transaction  Documents by the Company, the performance by the Company of its
obligations  under the Articles of Amendment and the consummation by the Company
of  the  transactions  contemplated  hereby  and  thereby  (including,   without
limitation,  the reservation for issuance and issuance of the Conversion  Shares
and  Warrant  Shares)  will not (i) result in a  violation  of the  Articles  of
Incorporation or the By-laws; (ii) conflict with, or constitute a default (or an
event which with notice or lapse of time or both would become a default)  under,
or  give to  others  any  rights  of  termination,  amendment,  acceleration  or
cancellation  of, any material  agreement,  indenture or instrument to which the
Company or any of its  Subsidiaries  is a party;  (iii) result in a violation of
any law, rule,  regulation,  order,  judgment or decree  (including  federal and
state securities laws and  regulations)  applicable to the Company or any of its
Subsidiaries  or by which any  property  or asset of the  Company  or any of its
Subsidiaries is bound or affected.  Neither the Company nor its  Subsidiaries is
in  violation  of any term of its  Articles of  Incorporation  or its By-laws or
their organizational  charter or by-laws,  respectively.  Except as disclosed in
Schedule 3(e),  neither the Company nor any of its  Subsidiaries is in violation
of  any  term  of  or  in  default  under  any  contract,  agreement,  mortgage,
indebtedness,  indenture,  instrument, judgment, decree or order or any statute,
rule or regulation  applicable to the Company or its Subsidiaries,  except where
such  violations and defaults would not result,  either  individually  or in the
aggregate,  in a Material  Adverse  Effect.  The business of the Company and its
Subsidiaries is not being conducted, and shall not be conducted, in violation of
any law, ordinance or regulation of any governmental  entity,  except where such
violations  would not result,  either  individually  or in the  aggregate,  in a
Material Adverse Effect. Except as specifically  contemplated by this Agreement,
as required under the 1933 Act, or as required by Blue Sky filings,  the Company
is not  required to obtain any consent,  authorization  or order of, or make any
filing or registration with, any court or governmental  agency or any regulatory
or self-regulatory agency in order for it to execute,  deliver or perform any of
its obligations under or contemplated by the Transaction Documents or to perform
its  obligations  under the Articles of Amendment in  accordance  with the terms
hereof or  thereof.  Except as  disclosed  in  Schedule  3(e),  all  consents of
security agencies and all other consents,  authorizations,  orders,  filings and
registrations  which the Company is required to obtain pursuant to the preceding
sentence  have been  obtained or effected  on or prior to the date  hereof.  The
Company and its  Subsidiaries  are unaware of any facts or  circumstances  which
might give rise to any of the foregoing.

                  (f) SEC Documents;  Financial  Statements.  Since December 31,
1997, the Company has filed all reports,  schedules, forms, statements and other
documents  required  to be filed by it with the SEC  pursuant  to the  reporting
requirements of the Securities Exchange Act of 1934, as amended (the "1934 Act")
(all of the foregoing  filed prior to the date hereof and all exhibits  included
therein  and  financial   statements   and   schedules   thereto  and  documents
incorporated  by reference  therein  being  hereinafter  referred to as the "SEC
Documents").  A complete  list of the  Company's  SEC  Documents is set forth on
Schedule 3(f). Except as disclosed on Schedule 3(f), as of the date hereof,  the
SEC Documents, as they may have been subsequently amended by filings made by the
Company with the SEC prior to the date hereof, complied in all material respects
with the  requirements  of the 1934 Act and the rules and

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 21 of 74

regulations of the SEC promulgated  thereunder  applicable to the SEC Documents.
None of the SEC  Documents,  as of the date  hereof  and as they  may have  been
subsequently  amended by filings  made by the Company  with the SEC prior to the
date hereof,  contained  any untrue  statement of a material  fact or omitted to
state a material  fact  required to be stated  therein or  necessary in order to
make the statements therein, in light of the circumstances under which they were
made,  not  misleading.  Except  as  disclosed  on  Schedule  3(f),  as of their
respective  dates,  the financial  statements of the Company included in the SEC
Documents  complied  as  to  form  in  all  material  respects  with  applicable
accounting  requirements and the published rules and regulations of the SEC with
respect thereto. Except as disclosed on Schedule 3(f), such financial statements
have been prepared in accordance with generally accepted accounting  principles,
consistently  applied,  during  the  periods  involved  (except  (i)  as  may be
otherwise  indicated in such financial  statements or the notes thereto, or (ii)
in the case of  unaudited  interim  statements,  to the extent  they may exclude
footnotes or may be condensed or summary  statements)  and fairly present in all
material respects the financial  position of the Company as of the dates thereof
and the  results of its  operations  and cash flows for the  periods  then ended
(subject,  in the  case  of  unaudited  statements,  to  normal  year-end  audit
adjustments).  No other  information  provided by or on behalf of the Company to
the  Buyers  which is not  included  in the SEC  Documents,  including,  without
limitation,  information  referred  to in  Section  2(d),  contains  any  untrue
statement of a material  fact or omits to state any material  fact  necessary in
order to make the statements  therein,  in the light of the  circumstance  under
which they are or were made, not misleading. The Company is not required to file
and will not be required to file any agreement,  note, lease, mortgage,  deed or
other instrument  entered into prior to the date hereof and to which the Company
is a party or by which the Company is bound which has not been previously  filed
as an exhibit to its reports filed with the SEC under the 1934 Act.

                  (g)  Absence  of  Certain  Changes.  Except  as  disclosed  in
Schedule 3(g) or as disclosed in the Company's  Annual Report on Form 10-KSB for
the year ended  December  26,  1999 or  Quarterly  Report on Form 10-QSB for the
period ending June 25, 2000,  since December 26, 1999,  there has been no change
or development  that has had or could  reasonably be expected to have a Material
Adverse  Effect.  The  Company has not taken any steps,  and does not  currently
expect to take any steps, to seek protection  pursuant to any bankruptcy law nor
does the  Company or any of its  Subsidiaries  have any  knowledge  or reason to
believe that its creditors intend to initiate involuntary bankruptcy proceedings
or any actual knowledge of any fact which would reasonably lead a creditor to do
so.  Except as  disclosed  in Schedule  3(g) or as  disclosed  in the  Company's
Quarterly  Report on Form  10-QSB for the period  ending  June 30,  2000,  since
December 31, 1999, the Company has not declared or paid any dividends,  sold any
assets,  individually or in the aggregate,  in excess of $100,000 outside of the
ordinary course of business or had capital expenditures,  individually or in the
aggregate, in excess of $250,000.

                  (h)  Absence  of  Litigation.   There  is  no  action,   suit,
proceeding,  inquiry  or  investigation  before or by any court,  public  board,
government  agency,  self-regulatory  organization  or body  pending  or, to the
knowledge  of the  Company  or any of its  Subsidiaries,  threatened  against or
affecting the Company, the Common Stock or any of the Company's  Subsidiaries or
any of the  Company's or the  Company's  Subsidiaries'  officers or directors in
their  capacities  as such,  except as expressly  set forth in Schedule 3(h) or,
with respect to the Company and its Subsidiaries, to the extent that such action
or threatened action does not set

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CUSIP No. 296744 10 5                     13D                      Page 22 of 74

forth potential liability, claims or charges,  individually or in the aggregate,
in excess of $100,000. Except as set forth in Schedule 3(h), to the knowledge of
the Company none of the  directors or officers of the Company have been involved
in securities-related litigation during the past five years.

                  (i)  Acknowledgment  Regarding Buyers' Purchase of Shares. The
Company  acknowledges and agrees that each of the Buyers is acting solely in the
capacity of an arm's length purchaser with respect to the Transaction  Documents
and the  Articles of  Amendment  and the  transactions  contemplated  hereby and
thereby.  The Company  further  acknowledges  that each Buyer is not acting as a
financial  advisor or fiduciary of the Company (or in any similar capacity) with
respect to the  Transaction  Documents  and the  Articles of  Amendment  and the
transactions  contemplated hereby and thereby and any advice given by any of the
Buyers or any of their respective  representatives  or agents in connection with
the  Transaction  Documents and the Articles of Amendment  and the  transactions
contemplated hereby and thereby is merely incidental to such Buyer's purchase of
the Securities.  The Company further represents to each Buyer that the Company's
decision to enter into the  Transaction  Documents  has been based solely on the
independent evaluation by the Company and its representatives.

                  (j)  No  Undisclosed  Events,  Liabilities,   Developments  or
Circumstances.  Except for the  issuance of the Series B Preferred  and Warrants
contemplated by this Agreement, no event, liability, development or circumstance
has occurred or exists, or is contemplated to occur, with respect to the Company
or its  Subsidiaries or their  respective  business,  properties,  operations or
financial condition, that would be required to be disclosed by the Company under
applicable  securities  laws on a registration  statement on Form S-1 filed with
the SEC  relating to an issuance and sale by the Company of its Common Stock and
which has not been publicly disclosed.

                  (k) No General  Solicitation.  Neither the Company, nor any of
its affiliates, nor any person acting on its or their behalf, has engaged in any
form of general  solicitation  or general  advertising  (within  the  meaning of
Regulation  D under  the 1933 Act) in  connection  with the offer or sale of the
Securities.

                  (l) No Integrated  Offering.  Neither the Company,  nor any of
its  affiliates,  nor any person acting on its or their behalf has,  directly or
indirectly,  made any offers or sales of any security or solicited any offers to
buy any security,  under  circumstances  that would require  registration of the
issuance  by the  Company of any of the  Securities  under the 1933 Act or cause
this offering of the  Securities to be  integrated  with prior  offerings by the
Company for purposes of the 1933 Act or,  except as set forth on Schedule  3(l),
any applicable  stockholder approval provisions,  nor will the Company or any of
its Subsidiaries take any action or steps that would require registration of the
issuance by the Company of any of the  Securities  under the 1933 Act or, except
as set forth on  Schedule  3(l),  cause the  offering  of the  Securities  to be
integrated with other offerings.

                  (m)  Employee  Relations.  Neither  the Company nor any of its
Subsidiaries is involved in any union labor dispute nor, to the knowledge of the
Company or any of its Subsidiaries,  is any such dispute threatened. None of the
Company's or its Subsidiaries'

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CUSIP No. 296744 10 5                     13D                      Page 23 of 74

employees is a member of a union which relates to such  employee's  relationship
with the Company,  neither the Company nor any of its Subsidiaries is a party to
a collective bargaining agreement,  and the Company and its Subsidiaries believe
that their  relations  with their  employees are good. No executive  officer (as
defined  in Rule  501(f) of the 1933 Act) has  notified  the  Company  that such
officer  intends to leave the  Company or  otherwise  terminate  such  officer's
employment with the Company.  No executive officer, to the best knowledge of the
Company and its Subsidiaries,  is, or is now expected to be, in violation of any
material  term  of  any  employment  contract,  confidentiality,  disclosure  or
proprietary  information  agreement,  non-competition  agreement,  or any  other
contract or agreement or any restrictive covenant,  and the continued employment
of each such  executive  officer  does not  subject  the  Company  or any of its
Subsidiaries to any liability with respect to any of the foregoing matters.

                  (n) Intellectual Property Rights. To the best of the Company's
knowledge,  the Company and its  Subsidiaries  own or possess adequate rights or
licenses  to use all  trademarks,  trade  names,  service  marks,  service  mark
registrations,  service names, patents, patent rights,  copyrights,  inventions,
licenses,  approvals,  governmental  authorizations,  trade  secrets  and  other
intellectual property rights necessary to conduct their respective businesses as
now conducted,  except where the failure to own or possess such rights would not
result,  either individually or in the aggregate,  in a Material Adverse Effect.
Except as set forth on Schedule  3(n), to the best of the  Company's  knowledge,
none of the  Company's  trademarks,  trade names,  service  marks,  service mark
registrations,  service names, patents, patent rights,  copyrights,  inventions,
licenses,  approvals,  governmental  authorizations,   trade  secrets  or  other
intellectual  property  rights have  expired or  terminated,  or are expected to
expire or  terminate  within two years from the date of this  Agreement,  except
where such expiration or termination would not result, either individually or in
the aggregate, in a Material Adverse Effect. The Company and its Subsidiaries do
not have any knowledge of any infringement by the Company or its Subsidiaries of
trademarks,  trade names,  service marks,  service mark  registrations,  service
names, patents, patent rights, copyrights,  inventions,  licenses, trade secrets
or other  intellectual  property  rights of  others,  or of any  development  of
identical  trade secrets or technical  information by others and,  except as set
forth on Schedule 3(n),  there is no claim,  action or proceeding  being made or
brought against, or to the Company's  knowledge,  being threatened against,  the
Company or its  Subsidiaries  regarding  its  trademarks,  trade names,  service
marks,  service mark  registrations,  service  names,  patents,  patent  rights,
copyrights,  inventions,  licenses,  trade  secrets,  or  infringement  of other
intellectual  property  rights.  The  Company  and its  Subsidiaries  have taken
reasonable  security measures to protect the secrecy,  confidentiality and value
of all of their intellectual properties.

                  (o) Title.  The  Company  and its  Subsidiaries  have good and
marketable  title in fee  simple to all real  property  and good and  marketable
title to all personal  property  owned by them which is material to the business
of the Company and its  Subsidiaries,  in each case free and clear of all liens,
encumbrances  and defects  except such as are described in Schedule 3(o) or such
as do not materially affect the value of such property and do not interfere with
the use made and proposed to be made of such  property by the Company and any of
its  Subsidiaries.  Any real  property  and  facilities  held under lease by the
Company and any of its Subsidiaries are held by them under valid, subsisting and
enforceable leases with such exceptions as are not material and do not interfere
with the use made and proposed to be made of such property and facilities by the
Company and its Subsidiaries.

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CUSIP No. 296744 10 5                     13D                      Page 24 of 74

                  (p) Insurance.  The Company and each of its  Subsidiaries  are
insured by insurers of recognized financial  responsibility  against such losses
and risks and in such  amounts  as  management  of the  Company  believes  to be
prudent  and  customary  in  the   businesses  in  which  the  Company  and  its
Subsidiaries  are engaged.  Neither the Company nor any such Subsidiary has been
refused any insurance coverage sought or applied for and neither the Company nor
any such  Subsidiary has any reason to believe that it will not be able to renew
its existing  insurance  coverage as and when such coverage expires or to obtain
similar  coverage  from  similar  insurers as may be  necessary  to continue its
business  at a cost that would not have a Material  Adverse  Effect,  taken as a
whole.

                  (q) Regulatory Permits.  Except for Permits (as defined below)
the absence of which would not result,  either individually or in the aggregate,
in a Material  Adverse  Effect,  the  Company and its  Subsidiaries  possess all
certificates,  authorizations  and permits  issued by the  appropriate  federal,
state or foreign  regulatory  authorities  necessary to conduct their respective
businesses (the "Permits"),  and neither the Company nor any such Subsidiary has
received any notice of proceedings relating to the revocation or modification of
any such Permit.

                  (r) Internal Accounting Controls.  The Company and each of its
Subsidiaries  maintain a system of internal  accounting  controls  sufficient to
provide  reasonable  assurance that (i)  transactions are executed in accordance
with  management's  general or specific  authorizations,  (ii)  transactions are
recorded  as  necessary  to  permit  preparation  of  financial   statements  in
conformity with generally accepted  accounting  principles and to maintain asset
accountability,  (iii) access to assets is  permitted  only in  accordance  with
management's   general  or  specific   authorization   and  (iv)  the   recorded
accountability  for assets is compared  with the existing  assets at  reasonable
intervals and appropriate action is taken with respect to any differences.

                  (s) No Materially Adverse Contracts,  Etc. Neither the Company
nor any of its Subsidiaries is subject to any charter,  corporate or other legal
restriction,  or any judgment,  decree,  order,  rule or regulation which in the
judgment of the  Company's  officers  has or is expected in the future to have a
Material  Adverse Effect.  Neither the Company nor any of its  Subsidiaries is a
party to any  contract  or  agreement  which in the  judgment  of the  Company's
officers has or is expected to have a Material Adverse Effect.

                  (t) Tax Status.  The Company and each of its  Subsidiaries (i)
has made or filed all  federal  and  state  income  and all  other tax  returns,
reports and  declarations  required by any  jurisdiction  to which it is subject
(unless and only to the extent that the Company and each of its Subsidiaries has
set aside on its books  provisions  reasonably  adequate  for the payment of all
unpaid and  unreported  taxes),  (ii) has paid all taxes and other  governmental
assessments  and charges that are material in amount,  shown or determined to be
due on such returns,  reports and declarations,  except those being contested in
good faith and for which the Company has made  appropriate  reserves  for on its
books, and (iii) has set aside on its books provisions  reasonably  adequate for
the  payment of all taxes for  periods  subsequent  to the periods to which such
returns,  reports or declarations (referred to in clause (i) above) apply. There
are no unpaid  taxes in any  material  amount  claimed  to be due by the  taxing
authority of any jurisdiction,  and the officers of the Company know of no basis
for any such claim.

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CUSIP No. 296744 10 5                     13D                      Page 25 of 74

                  (u)  Transactions  With  Affiliates.  Except  as set  forth on
Schedule 3(u),  and other than the grant of stock options  disclosed on Schedule
3(c), none of the officers, directors or employees of the Company is presently a
party to any transaction with the Company or any of its Subsidiaries (other than
for services as  employees,  officers and  directors),  including  any contract,
agreement or other  arrangement  providing for the  furnishing of services to or
by,  providing for rental of real or personal  property to or from, or otherwise
requiring payments to or from any such officer,  director or employee or, to the
knowledge of the Company, any corporation, partnership, trust or other entity in
which any such officer,  director,  or employee has a substantial interest or is
an officer, director, trustee or partner.

                  (v) Application of Takeover  Protections.  The Company and its
board of directors have taken all necessary  action,  if any, in order to render
inapplicable any control share acquisition,  business  combination,  poison pill
(including  any  distribution   under  a  rights  agreement)  or  other  similar
anti-takeover provision under the Articles of Amendment or the laws of the state
of its  incorporation  which is or could  become  applicable  to the Buyers as a
result of the transactions  contemplated by this Agreement,  including,  without
limitation,  the Company's  issuance of the Securities and the Buyers' ownership
of the Securities.

                  (w)  Rights   Agreement.   The   Company  has  not  adopted  a
shareholder  rights plan or similar  arrangement  relating to  accumulations  of
beneficial ownership of Common Stock or a change in control of the Company.

                  (x) No Other  Agreements.  The  Company  has not,  directly or
indirectly,  made  any  agreements  with any  Buyers  relating  to the  terms or
conditions of the transactions  contemplated by the Transaction Documents except
as set forth in the Transaction Documents.

         4.       COVENANTS.

                  (a) Best  Efforts.  Each party  shall use its best  efforts to
timely  satisfy  each of the  conditions  to be  satisfied  by it as provided in
Sections 6 and 7 of this Agreement.

                  (b) Form D and Blue Sky.  The Company  agrees to file a Form D
with respect to the Securities as required  under  Regulation D and to provide a
copy thereof to each Buyer promptly after such filing.  The Company shall,  take
such action as the Company shall  reasonably  determine is necessary in order to
obtain an exemption  for or to qualify the  Securities  for,  sale to the Buyers
pursuant to this Agreement under applicable securities or "Blue Sky" laws of the
states of the United  States,  and shall provide  evidence of any such action so
taken to the  Buyers.  The  Company  shall make all other  filings  and  reports
relating  to the  offer and sale of the  Securities  required  under  applicable
securities or "Blue Sky" laws of the states of the United States.

                  (c) Reporting  Status.  Until the date which is one year after
the  date  as of  which  the  Stockholders  (as  that  term  is  defined  in the
Registration Rights Agreement) may sell all of the Conversion Shares and Warrant
Shares without  restriction  pursuant to Rule 144(k)  promulgated under the 1933
Act (or successor thereto) (the "Reporting Period"),  the Company

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 26 of 74

shall file all reports  required  to be filed with the SEC  pursuant to the 1934
Act, and the Company  shall not  terminate  its status as an issuer  required to
file  reports  under  the  1934  Act  even  if the  1934  Act or the  rules  and
regulations thereunder would otherwise permit such termination.

                  (d) Use of Proceeds.  The Company  will use the proceeds  from
the  sale  of the  Shares  substantially  for  the  development  of the  optical
channelizer and optical CDMA.

                  (e)  Financial  Information.  The  Company  agrees to send the
following  to each  Stockholder  (as that term is  defined  in the  Registration
Rights Agreement) during the Reporting Period: (i) within two (2) days after the
filing  thereof  with the SEC, a copy of its Annual  Reports on Form  10-KSB (or
10-K),  its Quarterly  Reports on Form 10-QSB (or 10-Q),  any Current Reports on
Form 8-K and any registration  statements (other than on Form S-8) or amendments
filed  pursuant to the 1933 Act,  provided  that if any such report is not filed
with the SEC through  EDGAR then the Company shall deliver a copy of such report
to each  Stockholder by facsimile on the same day it is filed with the SEC; (ii)
on the same day as the release  thereof,  facsimile copies of all press releases
issued  by the  Company  or any of its  Subsidiaries;  and  (iii)  copies of any
notices and other information made available or given to the stockholders of the
Company generally, contemporaneously with the making available or giving thereof
to the stockholders.

                  (f)  Reservation of Shares.  The Company shall take all action
necessary  to at all times have  authorized,  and  reserved  for the  purpose of
issuance,  no less than the number of shares of Common  Stock  needed to provide
for  the  issuance  of  the  shares  of  Common  Stock  upon  conversion  of all
outstanding Shares and exercise of all Warrants.

                  (g) Listing.  The Company shall as soon as practicable  secure
the listing of all of the  Registrable  Shares (as  defined in the  Registration
Rights  Agreement) upon the Nasdaq Stock Market and shall  maintain,  so long as
any  other  shares of Common  Stock  shall be so  listed,  such  listing  of all
Registrable Shares from time to time issuable under the terms of the Transaction
Documents and the Articles of Amendment.

                  (h)  Filing  of  Form  8-K.  Promptly  following  the  Initial
Closing,  the  Company  shall  file a  Current  Report  on Form 8-K with the SEC
describing  the  terms  of the  transactions  contemplated  by  the  Transaction
Documents  and  including  as exhibits to such  Current  Report on Form 8-K this
Agreement,  the Articles of Amendment and the Registration Rights Agreement,  in
the form required by the 1934 Act.

                  (i) Meeting of  Shareholders.  In the event that  designees of
the  Buyers do not at any time  comprise  a  majority  of the  directors  of the
Corporation,  the Company shall, at the request of the Buyers, convene a meeting
of  shareholders  for the election of  directors as soon as possible;  provided,
however,  that this Section 4(i) shall be applicable  only so long as Buyers (i)
hold Series B Preferred and (b) are not in default beyond the  applicable  grace
and cure provisions in their obligations to make payments on Subsequent Closings
under Section 1(c) of this Agreement.

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CUSIP No. 296744 10 5                     13D                      Page 27 of 74

         5.       TRANSFER AGENT INSTRUCTIONS.

                  The  Company  shall  issue  irrevocable  instructions  to  its
transfer  agent in the form  attached  hereto  as  Exhibit  D (the  "Irrevocable
Transfer Agent  Instructions"),  and any  subsequent  transfer  agent,  to issue
certificates, registered in the name of each Buyer or its respective nominee(s),
for the  Conversion  Shares and Warrant Shares in such amounts as specified from
time to time by each  Buyer to the  Company  upon  conversion  of the  Shares or
exercise of the Warrants.  The Company  warrants that no instruction  other than
the Irrevocable  Transfer Agent Instructions  referred to in this Section 5 will
be given by the  Company to its  transfer  agent and that the  Securities  shall
otherwise be freely  transferable on the books and records of the Company as and
to the extent provided in this Agreement and the Registration  Rights Agreement.
If a Buyer  provides  the  Company  with an opinion of  counsel,  in a generally
acceptable form (it being  stipulated that an opinion of Hale and Dorr LLP shall
be  acceptable),  to the effect that a public  sale,  assignment  or transfer of
Securities  may be made  without  registration  under  the 1933 Act or the Buyer
provides the Company with reasonable assurances (including,  if requested by the
Company,  delivering  such  reasonable  assurances to the  Company's  counsel in
connection  with such counsel  rendering an opinion on the validity of a sale by
such Buyer  pursuant to Rule 144) that the  Securities  can be sold  pursuant to
Rule 144 without any restriction as to the number of securities acquired as of a
particular date that can then be immediately  sold, the Company shall permit the
transfer,  and, in the case of the  Conversion  Shares and the  Warrant  Shares,
promptly  instruct its transfer agent to issue one or more  certificates in such
name and in such  denominations  as  specified  by such  Buyer and  without  any
restrictive  legend.  The  Company  acknowledges  that  a  breach  by it of  its
obligations hereunder will cause irreparable harm to the Buyers by vitiating the
intent and purpose of the  transaction  contemplated  hereby.  Accordingly,  the
Company  acknowledges  that the  remedy at law for a breach  of its  obligations
under this Section 5 will be inadequate and agrees,  in the event of a breach or
threatened  breach by the Company of the  provisions of this Section 5, that the
Buyers shall be entitled,  in addition to all other  available  remedies,  to an
order and/or injunction  restraining any breach and requiring immediate issuance
and  transfer,  without the  necessity of showing  economic loss and without any
bond or other security being required.

         6.  CONDITIONS  TO THE  COMPANY'S  OBLIGATIONS.  The  obligation of the
Company  to  issue  and  sell  the  Shares  to  each  Buyer  is  subject  to the
satisfaction,  at or before the date of the  Initial  Closing,  or a  Subsequent
Closing, as applicable of each of the following conditions,  provided that these
conditions  are for the Company's  sole benefit and may be waived by the Company
at any time in its sole  discretion  by providing  each Buyer with prior written
notice thereof:

             (a) As of the Initial Closing,  such Buyer shall have executed each
         of the  Transaction  Documents to which it is a party and delivered the
         same to the Company.

             (b) As of the Initial Closing, the Articles of Amendment shall have
         been filed with the Virginia State Corporation Commission;

             (c) The  representations and warranties of such Buyer shall be true
         and correct in all material respects as of the date when made and as of
         the Initial Closing and such Subsequent Closings as though made at that
         time, and such Buyer shall have performed,  satisfied and complied with
         the covenants,  agreements and conditions  required by the  Transaction
         Documents to be performed,  satisfied or complied with by such Buyer at
         or prior to the Initial Closing.

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CUSIP No. 296744 10 5                     13D                      Page 28 of 74

         7. CONDITIONS TO EACH BUYER'S OBLIGATIONS. The obligation of each Buyer
hereunder   to  purchase   the  Shares  from  the  Company  is  subject  to  the
satisfaction,  at or  before  the date of the  Initial  Closing,  of each of the
following  conditions,  provided that these conditions are for each Buyer's sole
benefit  and may be waived by such Buyer at any time in its sole  discretion  by
providing the Company with prior written notice thereof:

             (a)  The  Company  shall  have  executed  each  of the  Transaction
         Documents and delivered the same to such Buyer.

             (b) The  Articles  of  Amendment  shall  have been  filed  with the
         Virginia State Corporation Commission,  and a copy thereof certified by
         the Virginia State Corporation  Commission shall have been delivered to
         such Buyer.

             (c) The representations and warranties of the Company shall be true
         and correct (except that  representations  and warranties which are not
         qualified by the terms  "material"  or "Material  Adverse  Effect" need
         only be true and correct in all material  respects) as of the date when
         made and as of the date of the  Initial  Closing as though made at that
         time  (except for  representations  and  warranties  that speak as of a
         specific  date) and the Company  shall have  performed,  satisfied  and
         complied with the covenants,  agreements and conditions required by the
         Transaction  Documents to be  performed,  satisfied or complied with by
         the  Company  at or prior to the date of  Initial  Closing.  Such Buyer
         shall have  received a  certificate,  executed  by the Chief  Executive
         Officer of the Company, dated as of the date of Initial Closing, to the
         foregoing  effect  and as to such other  matters  as may be  reasonably
         requested by such Buyer.

             (d) Such Buyer shall have received the opinion of Whiteford, Taylor
         & Preston L.L.P.,  dated as of the date of Initial  Closing,  in a form
         reasonably acceptable to such Buyer to the effect that:

                 (i) the Company has been duly incorporated and organized and is
         validly   existing  and  in  good  standing   under  the  laws  of  the
         Commonwealth  of  Virginia.  The  Company has the  corporate  power and
         authority to carry on its business as now  conducted  and to enter into
         and  perform  its  obligations  under the  Transaction  Documents.  The
         Company is duly  qualified to do business and is in good  standing as a
         foreign corporation in the State of Maryland.

                 (ii) the  issuance,  sale and  delivery  of the  Shares and the
         Warrants by the Company and the issuance and delivery of the Conversion
         Shares and the Warrant  Shares have been duly  authorized  and reserved
         for issuance,  as the case may be, by all necessary corporate action on
         the part of the Company.  The Shares and the Warrants,  when so issued,
         sold and delivered  against  payment  therefore as contemplated by this
         Agreement,  and the  Conversion  Shares and the  Warrant  Shares,  when
         issued upon conversion of the Shares or exercise of the Warrants,  will
         be validly issued, fully paid and non-assessable.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 29 of 74

                 (iii) the execution, delivery and performance by the Company of
         each of the  Transaction  Documents  have been duly  authorized  by all
         requisite  corporate  action,  and the  Company has duly  executed  and
         delivered the Transaction Documents.  Each of the Transaction Documents
         are valid and binding  obligations  of the Company and are  enforceable
         against the Company in accordance with their terms,  except as the same
         may  be   limited   by   applicable   insolvency   laws  or   equitable
         considerations,  and except that no opinion need be expressed as to the
         enforceability of provisions  requiring  indemnification for violations
         of federal securities laws. The Company's execution and delivery of the
         Transaction  Documents and the Company's performance of its obligations
         thereunder  do not  conflict  with  or  result  in a  violation  of the
         Company's Articles of Incorporation or Bylaws,  each as amended to date
         and presently in effect,  or any indenture,  lease,  agreement or other
         instrument  known to such counsel to which the Company is a party or by
         which it or its  property is bound,  or any  decree,  judgment or order
         known to such counsel that is binding upon the Company.

                 (iv) except as obtained  and in effect at the Initial  Closing,
         no approval,  consent or authorization  of any  governmental  authority
         (other  than  filings  required to be made after such  Initial  Closing
         under applicable  federal and state securities laws) is required of the
         Company in connection with the execution of delivery of the Transaction
         Documents,  or the offer, issuance,  sale and delivery of the Shares or
         the other transactions to be consummated pursuant to this Agreement.

                 (v) To the  best of such  counsel's  knowledge,  except  as set
         forth in Schedule 3(h) to this Agreement,  there is no action,  suit or
         proceeding,  or  governmental  inquiry  or  investigation,  pending  or
         threatened against the Company.

             (e) The Company shall have executed and delivered to such Buyer the
         Preferred Stock Certificates (in such denominations as such Buyer shall
         request)  for the Shares  being  purchased by such Buyer at the Initial
         Closing and the Warrants  being  purchased by such Buyer at the Initial
         Closing.

             (f) The  Board of  Directors  of the  Company  shall  have  adopted
         resolutions consistent with Section 3(b) above and in a form reasonably
         acceptable to such Buyer (the "Resolutions").

             (g) As of the date of  Initial  Closing,  the  Company  shall  have
         reserved out of its  authorized and unissued  Common Stock,  solely for
         the purpose of effecting the  conversion of the Shares and the exercise
         of the Warrants, at least 4,000,000 shares of Common Stock.

             (h) The  Irrevocable  Transfer Agent  Instructions,  in the form of
         Exhibit  D  attached   hereto,   shall  have  been   delivered  to  and
         acknowledged in writing by the Company's transfer agent.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 30 of 74

             (i) The Company  shall have  delivered to such Buyer a  certificate
         evidencing the  incorporation and good standing of the Company and each
         Subsidiary  in such entity's  state of  incorporation  or  organization
         issued by the  Secretary  of State of such  state of  incorporation  or
         organization  as of a date within ten days prior to the date of Initial
         Closing  and  the  Company  shall  have   delivered  to  such  Buyer  a
         certificate  evidencing the Company's  qualification  to do business in
         Maryland  as of a date  within  ten days  prior to the date of  Initial
         Closing.

             (j) The Company shall have delivered to such Buyer a certified copy
         of the Articles of  Incorporation  as  certified by the Virginia  State
         Corporation  Commission  as of a date within ten days prior to the date
         of Initial Closing.

             (k) The Company  shall have  delivered to such Buyer a  secretary's
         certificate,  dated as of the date of Initial Closing, certifying as to
         (A) the  Resolutions,  (B) the  Articles of  Incorporation  and (C) the
         By-laws, each as in effect at the Initial Closing.

             (l) The  Company  shall have  obtained  all  consents  required  in
         connection  with  the  transaction   contemplated  by  the  Transaction
         Documents,  including  without  limitation  all  requisite  consents of
         security agencies,  and shall have delivered copies of such consents to
         the Buyers.

             (m) The Company  shall have made all filings  under all  applicable
         federal and state  securities laws necessary to consummate the issuance
         of the Securities  pursuant to this  Agreement in compliance  with such
         laws.

             (n) The Company  shall have  delivered  to such Buyer a letter from
         the Company's  transfer agent certifying the number of shares of Common
         Stock  outstanding  as of a date  within five days prior to the date of
         Initial Closing.

             (o) The members of the Board of Directors  of the Company  shall be
         Leonard  Moodispaw,  Terry Turpin,  Robert Hicks,  Frank  Manning,  Ray
         Keeler,  Harold  Hanson,  John Hannon,  Caroline  Pisano and H. Jeffrey
         Leonard.

             (p) All of the issued and  outstanding  capital  stock of Veriterre
         Corporation shall have been assigned to the Company on terms acceptable
         to the Buyers.

             (q) The Company  shall have entered into  Employment  Agreements in
         the form of Exhibit E attached here to with those persons  specified by
         the Buyers.

             (r) The Company  shall have  obtained  the  written  consent to the
         transactions  contemplated  hereby of those  persons  specified  by the
         Buyers in a form satisfactory to the Buyer.

             (s) The Company shall have renegotiated the terms and conditions of
         its agreement with Rumsey Associates  Limited  Partnership so that none
         of the amounts  paid to the Company  hereunder  shall be paid to or for
         the  benefit  of  Rumsey  Associates   Limited   Partnership  and  such
         negotiated terms and conditions are otherwise acceptable to Buyers.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 31 of 74

             (t) The  Company  shall have  delivered  to the  Buyers  such other
         documents relating to the transactions  contemplated by the Transaction
         Documents as the Buyers or their counsel may reasonably request.

         8.  INDEMNIFICATION.  In  consideration  of each Buyer's  execution and
delivery of the  Transaction  Documents and acquiring the Securities  thereunder
and in addition to all of the Company's other  obligations under the Transaction
Documents  and the Articles of Amendment,  the Company  shall  defend,  protect,
indemnify and hold  harmless each Buyer and each other holder of the  Securities
and all of their  stockholders,  officers,  directors,  employees  and direct or
indirect   investors  and  any  of  the  foregoing   persons'  agents  or  other
representatives  (including,  without  limitation,  those retained in connection
with  the  transactions  contemplated  by  this  Agreement)  (collectively,  the
"Indemnitees")  from and against any and all actions,  causes of action,  suits,
claims, losses, costs, penalties, fees, liabilities and damages, and expenses in
connection therewith  (irrespective of whether any such Indemnitee is a party to
the  action  for which  indemnification  hereunder  is  sought),  and  including
reasonable  attorneys' fees and disbursements  (the "Indemnified  Liabilities"),
incurred by any Indemnitee as a result of, or arising out of, or relating to (a)
any  misrepresentation  or breach of any  representation or warranty made by the
Company in the  Transaction  Documents or any other  certificate,  instrument or
document  contemplated  hereby  or  thereby,  (b) any  breach  of any  covenant,
agreement or obligation of the Company contained in the Transaction Documents or
any other certificate,  instrument or document  contemplated  hereby or thereby,
(c) any cause of action,  suit or claim brought or made against such  Indemnitee
(other than a cause of action, suit or claim which is (x) brought or made by the
Company  and (y) is not a  shareholder  derivative  suit) and  arising out of or
resulting  from (i) the execution,  delivery,  performance or enforcement of the
Transaction   Documents  or  any  other  certificate,   instrument  or  document
contemplated hereby or thereby,  (ii) any transaction financed or to be financed
in whole or in part,  directly or indirectly,  with the proceeds of the issuance
of the  Securities or (iii) the status of such Buyer or holder of the Securities
as an investor in the Company.  To the extent that the foregoing  undertaking by
the Company may be  unenforceable  for any  reason,  the Company  shall make the
maximum  contribution to the payment and satisfaction of each of the Indemnified
Liabilities  which is permissible  under applicable law. Except as otherwise set
forth  herein,  the  mechanics  and  procedures  with  respect to the rights and
obligations under this Section 8 shall be the same as those set forth in Section
2 of the Registration Rights Agreement,  including,  without  limitation,  those
procedures with respect to the settlement of claims and the Company's  rights to
assume the defense of claims.

         9.  MISCELLANEOUS.

             (a)  Governing  Law;  Jury  Trial.  All  questions  concerning  the
construction,  validity,  enforcement and interpretation of this Agreement shall
be governed by the internal laws of the Commonwealth of Virginia, without giving
effect to any choice of law or conflict  of law  provision  or rule.  EACH PARTY
HEREBY  IRREVOCABLY  WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST,  A
JURY  TRIAL FOR THE  ADJUDICATION  OF ANY  DISPUTE  HEREUNDER  OR IN  CONNECTION
HEREWITH  OR  ARISING  OUT OF THIS  AGREEMENT  OR ANY  TRANSACTION  CONTEMPLATED
HEREBY.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 32 of 74

             (b)  Counterparts.  This  Agreement  may be executed in two or more
identical  counterparts,  all of  which  shall  be  considered  one and the same
agreement and shall become effective when  counterparts have been signed by each
party and  delivered to the other  party;  provided  that a facsimile  signature
shall be  considered  due  execution  and shall be  binding  upon the  signatory
thereto with the same force and effect as if the signature were an original, not
a facsimile signature.

             (c) Headings. The headings of this Agreement are for convenience of
reference  and shall not form part of, or affect  the  interpretation  of,  this
Agreement.

             (d)  Severability.  If any  provision  of this  Agreement  shall be
invalid   or   unenforceable   in   any   jurisdiction,   such   invalidity   or
unenforceability  shall  not  affect  the  validity  or  enforceability  of  the
remainder  of  this   Agreement  in  that   jurisdiction   or  the  validity  or
enforceability of any provision of this Agreement in any other jurisdiction.

             (e) Entire  Agreement;  Amendments.  This Agreement  supersedes all
other prior oral or written  agreements  between each Buyer, the Company,  their
affiliates  and  persons  acting on their  behalf  with  respect to the  matters
discussed  herein,  and this  Agreement and the  instruments  referenced  herein
contain  the entire  understanding  of the parties  with  respect to the matters
covered  herein and therein  and,  except as  specifically  set forth  herein or
therein,  neither the Company nor any Buyer makes any representation,  warranty,
covenant or  undertaking  with  respect to such  matters.  No  provision of this
Agreement may be amended or waived other than by an instrument in writing signed
by the Company and the Buyers.

             (f) Notices. Any notices, consents, waivers or other communications
required or permitted to be given under the terms of this  Agreement  must be in
writing  and will be deemed  to have  been  delivered:  (i) upon  receipt,  when
delivered  personally;  (ii)  upon  receipt,  when sent by  facsimile  (provided
confirmation of transmission  is  mechanically or  electronically  generated and
kept on file by the sending party);  or (iii) one (1) business day after deposit
with a nationally  recognized  overnight delivery service, in each case properly
addressed to the party to receive the same. The addresses and facsimile  numbers
for such communications shall be:

         If to the Company:

                  Essex Corporation
                  9150 Guilford Road
                  Columbia, Maryland 21046
                  Telephone:        301-939-7000
                  Facsimile:        301-953-7880
                  Attention:        Leonard E. Moodispaw, President


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 33 of 74

                  With a copy to:
                  D. Scott Freed, Esq.
                  Whiteford, Taylor & Preston, L.L.P.
                  7 Saint Paul Street
                  Baltimore, Maryland  21202-1626
                  Telephone:        410-347-8700
                  Facsimile:        410-752-7092

                  If to the Transfer Agent:
                  Registrar and Transfer Company
                  10 Commerce Drive
                  Cranford, New Jersey 07016-3572

                  If to a Buyer,  to it at the address and facsimile  number set
forth on the Schedule of Buyers, with copies to such Buyer's  representatives as
set forth on the Schedule of Buyers,  or at such other address and/or  facsimile
number and/or to the  attention of such other person as the recipient  party has
specified  by written  notice  given to each other  party five days prior to the
effectiveness of such change.  Written  confirmation of receipt (A) given by the
recipient  of  such  notice,  consent,   waiver  or  other  communication,   (B)
mechanically  or  electronically  generated  by the sender's  facsimile  machine
containing the time, date,  recipient facsimile number and an image of the first
page of such transmission or (C) provided by a nationally  recognized  overnight
delivery service shall be rebuttable  evidence of personal  service,  receipt by
facsimile or receipt from a nationally  recognized overnight delivery service in
accordance with clause (i), (ii) or (iii) above, respectively.

                  (g)  Successors and Assigns.  This Agreement  shall be binding
upon and inure to the benefit of the parties and their respective successors and
assigns,  including any  purchasers of the Shares.  The Company shall not assign
this  Agreement or any rights or  obligations  hereunder  including by merger or
consolidation  without  the prior  written  consent of the  Buyers.  A Buyer may
assign some or all of its rights  hereunder  without the consent of the Company,
provided,  however, that the transferee has agreed in writing to be bound by the
applicable  provisions  of this  Agreement and the Company has consented to such
assignment and  assumption,  which consent shall not be  unreasonably  withheld.
Notwithstanding  the foregoing,  a Buyer may transfer  Shares only to a partner,
member,  stockholder or affiliate of such Buyer, but a Buyer may transfer freely
Conversion Shares or any other securities of the Company a Buyer may hold.

                  (h) No Third Party  Beneficiaries.  This Agreement is intended
for the benefit of the parties hereto and their respective  permitted successors
and  assigns,  and is not for the  benefit of, nor may any  provision  hereof be
enforced by, any other person.

                  (i)  Survival.  The  representations  and  warranties  of  the
Company  and the  Buyers  contained  in  Sections  2 and 3, the  agreements  and
covenants set forth in Sections 4, 5 and 9, and the  indemnification  provisions
set forth in Section 8, shall survive the Initial  Closing.  Each Buyer shall be
responsible  only  for  its  own  representations,  warranties,  agreements  and
covenants hereunder.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 34 of 74

                  (j) Publicity. The Company and each Buyer shall have the right
to approve  before  issuance any press  releases or any other public  statements
with respect to the  transactions  contemplated  hereby,  such consent not to be
unreasonably withheld.

                  (k) Further  Assurances.  Each party shall do and perform,  or
cause to be done and  performed,  all such  further  acts and things,  and shall
execute and deliver all such other  agreements,  certificates,  instruments  and
documents,  as the other party may reasonably  request in order to carry out the
intent and accomplish the purposes of this Agreement and the consummation of the
transactions contemplated hereby.

                  (l) Brokers; Placement Agent. The Company acknowledges that it
has not engaged a broker or placement  agent in connection  with the sale of the
Shares,  or the Warrants.  The Company  shall pay, and hold each Buyer  harmless
against,  any  liability,  loss  or  expense  (including,   without  limitation,
attorney's fees and out-of-pocket  expenses) arising in connection with any such
claim for brokers',  financial  advisory or similar fees in connection with such
transaction.

                  (m)  Remedies.  Each Buyer and each  holder of the  Securities
shall have all rights and remedies set forth in the  Transaction  Documents  and
the  Articles of Amendment  and all rights and remedies  which such holders have
been  granted at any time under any other  agreement  or contract and all of the
rights which such holders have under any law. Any person having any rights under
any  provision  of this  Agreement  shall be  entitled  to enforce  such  rights
specifically  (without posting a bond or other security),  to recover damages by
reason of any breach of any  provision  of this  Agreement  and to exercise  all
other rights granted by law.

                  (n) Voting of Common Stock by Buyers.  Each Buyer agrees that,
so long as it  holds  Series  B  Preferred  which  it has the  right  to vote as
provided in Section (c)(B)(4)(a) of the Articles of Amendment,  such Buyer shall
vote any  shares  of Common  Stock  held by it or any of its  affiliates  on any
matter voted on by  shareholders  of the Company in the same  proportions as all
other shares of the Common Stock of the Company,  excluding any shares of Common
Stock held by a Buyer, are voted on such matter.  It shall be a condition of any
transfer by a Buyer of shares of Common  Stock  acquired by a Buyer  pursuant to
conversion  of Series B Preferred  or  exercise of a Warrant  (but not shares of
Common  Stock  acquired by the Buyer in the open  market),  that the  transferee
agree to be bound by the provisions of this subsection (n) to the same extent as
the Buyer.

                  IN WITNESS  WHEREOF,  the Buyers and the  Company  have caused
this  Securities  Purchase  Agreement  to be duly  executed as of the date first
written above.

                                    COMPANY:

                                    ESSEX CORPORATION

                                    By: /s/ Leonard Moodispaw
                                        ----------------------------------------
                                        Name:  Leonard Moodispaw
                                        Title: President

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 35 of 74

                                    BUYERS:

                                    GEF OPTICAL INVESTMENT
                                    COMPANY, LLC

                                    By:  /s/ H. Jeffrey Leonard
                                         ---------------------------------------
                                         Name:  H. Jeffrey Leonard
                                         Title: President

                                    NETWORKING VENTURES, LLC


                                    By:  /s/ John G. Hannon
                                         ---------------------------------------
                                         Name:  John G. Hannon
                                         Title: Partner


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 36 of 74

                               SCHEDULE OF BUYERS

<TABLE>
<CAPTION>


                            Investor Address      Number of Shares       Number of Shares            Shares Covered by
    Investor Name         and Facsimile Number    (Initial Closing)      Subsequent Closings             Warrants
<S>                       <C>                     <C>                    <C>                         <C>


GEF Optical Investment    1225 Eye Street,            125,000        December 15, 2000:   31,250       1,000,000
Company, LLC              N.W, Suite 900                             March 15, 2001:      31,250
                          Washington, DC 20005                       June 15, 2001:       31,250
                                                                     September 15, 2001:  31,250

Networking Ventures,      8970 Route 108              125,000        December 15, 2000:   31,250       1,000,000
L.L.C.                    Columbia, MD 21045                         March 15, 2001:      31,250
                                                                     June 15, 2001:       31,250
                                                                     September 15, 2001:  31,250

</TABLE>


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 37 of 74

                                    SCHEDULES

Schedule 3(a)       -      Subsidiaries
Schedule 3(c)       -      Capitalization
Schedule 3(e)       -      Conflicts
Schedule 3(f)       -      SEC Documents
Schedule 3(g)       -      Material Changes
Schedule 3(h)       -      Litigation
Schedule 3(l)       -      Integration
Schedule 3(n)       -      Intellectual Property
Schedule 3(o)       -      Liens
Schedule 3(u)       -      Transactions with Affiliates

                                    EXHIBITS

Exhibit A           -      Form of Articles of Amendment
Exhibit B           -      Form of Warrant
Exhibit C           -      Form of Registration Rights Agreement
Exhibit D           -      Form of Irrevocable Transfer Agent Instructions
Exhibit E           -      Form of Employment Agreement




<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 38 of 74

                                    EXHIBIT 2

           THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUED UPON ITS
                   EXERCISE ARE SUBJECT TO THE RESTRICTIONS ON
                 TRANSFER SET FORTH IN SECTION 4 OF THIS WARRANT

Warrant No. __                                       Number of Shares: 1,000,000
                                                         (subject to adjustment)
Date of Issuance: September 8, 2000

                                ESSEX CORPORATION

                          Common Stock Purchase Warrant

                         (Void after September 8, 2005)

         Essex Corporation,  a Virginia  corporation (the "Company"),  for value
received,  hereby certifies that  _________________,  or its registered  assigns
(the "Registered Holder"), is entitled,  subject to the terms and conditions set
forth below,  to purchase from the Company,  at any time or from time to time on
or after the date of  issuance  and on or before  5:00  p.m.  (Eastern  time) on
September  8, 2005,  1,000,000  shares of Common  Stock,  of the  Company,  at a
purchase price of $.001 per share. The shares  purchasable upon exercise of this
Warrant,  and the purchase  price per share,  each as adjusted from time to time
pursuant to the provisions of this Warrant,  are hereinafter  referred to as the
"Warrant Shares" and the "Purchase Price," respectively.

         1.    Exercise.

         (a) Subject to subsection 1(c) below,  this Warrant may be exercised by
the Registered  Holder, in whole or in part, by surrendering this Warrant,  with
the purchase form appended  hereto as Exhibit I duly executed by the  Registered
Holder or by the Registered Holder's duly authorized attorney,  at the principal
office of the  Company,  or at such other  office or agency as the  Company  may
designate, accompanied by payment in full, in lawful money of the United States,
of the  Purchase  Price  payable in  respect  of the  number of  Warrant  Shares
purchased upon such exercise.

         (b) Subject to subsection 1(c) below, the Registered Holder may, at its
option,  elect to pay some or all of the Purchase Price payable upon an exercise
of this  Warrant by  canceling a portion of this  Warrant  exercisable  for such
number of Warrant  Shares as is  determined  by dividing (i) the total  Purchase
Price payable in respect of the number of Warrant  Shares being  purchased  upon
such  exercise by (ii) the excess of the Fair  Market  Value per share of Common
Stock  (as  defined  below)  averaged  over the five  trading  days  immediately
preceding  the  Exercise  Date (as  defined in  subsection  1(d) below) over the
Purchase  Price per share.  If the  Registered  Holder  wishes to exercise  this
Warrant pursuant to this method of payment with respect to the maximum number of
Warrant Shares purchasable  pursuant to this method,  then the number of Warrant
Shares so  purchasable  shall be equal to the total  number of  Warrant  Shares,
minus the

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 39 of 74

product  obtained by multiplying (x) the total number of Warrant Shares by (y) a
fraction,  the numerator of which shall be the Purchase  Price per share and the
denominator  of which shall be the Fair Market  Value per share of Common  Stock
averaged over the five trading days immediately preceding the Exercise Date. The
Fair Market Value per share of Common Stock shall be determined as follows:

                  (i) If the  Common  Stock is listed on a  national  securities
exchange,  Nasdaq  Stock  Market,  OTC  Bulletin  Board  or  another  nationally
recognized  trading  system as of the Exercise  Date,  the Fair Market Value per
share of Common  Stock  shall be deemed  to be the  average  of the high and low
reported sale prices per share of Common Stock  (provided  that if no such price
is reported on such day,  the Fair Market  Value per share of Common Stock shall
be determined pursuant to clause (ii)).

                  (ii)  If  the  Common  Stock  is  not  listed  on  a  national
securities  exchange,  Nasdaq  Stock  Market,  OTC  Bulletin  Board  or  another
nationally  recognized  trading  system as of the Exercise Date, the Fair Market
Value per share of Common  Stock shall be deemed to be the amount most  recently
determined  by the Board of  Directors  to  represent  the fair market value per
share of the Common Stock  (including  without  limitation a  determination  for
purposes of  granting  Common  Stock  options or issuing  Common  Stock under an
employee  benefit plan of the  Company);  and,  upon  request of the  Registered
Holder,  the Board of Directors (or a  representative  thereof)  shall  promptly
notify the Registered Holder of the Fair Market Value per share of Common Stock.
Notwithstanding  the  foregoing,  if the Board of Directors  has not made such a
determination within the three-month period prior to the Exercise Date, then (A)
the Board of Directors shall make a  determination  of the Fair Market Value per
share of the Common Stock within 15 days of a request by the  Registered  Holder
that it do so, and (B) the exercise of this Warrant  pursuant to this subsection
1(b) shall be delayed until such determination is made.

         (c)      This Warrant shall be exercisable only to the extent set forth
in this subsection 1(c):

                  (i) If the Fair Market Value of the Common  Stock  (determined
as provided in subsection  1(b)(i) above),  for five  consecutive  trading days,
with aggregate volume on the market on which the Common Stock is traded for such
five consecutive trading days of at least 100,000 shares, exceeds the amount set
forth below under the heading  "Share Price"  (adjusted for stock splits,  stock
dividends  and similar  recapitalizations),  this Warrant shall  immediately  be
exercisable  to purchase the number of Warrant  Shares set forth below under the
heading "Cumulative Shares Exercisable:"

                 Share Price                   Cumulative Shares Exercisable
                 $10                           250,000
                 $12                           375,000
                 $14                           500,000
                 $16                           625,000
                 $18                           750,000
                 $20                           1,000,000

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 40 of 74

                  (ii)  In  addition,  this  Warrant  shall  be  exercisable  to
purchase all of the Warrant Shares covered by this Warrant  immediately prior to
the  closing of (A) a sale of  securities  by the  Company by means of a private
placement  or  pursuant  to a  registration  statement,  which  results in gross
proceeds to the  Company of at least  $10,000,000  and which  values the Company
immediately  prior to such sale of securities at  $50,000,000  or more,  (B) any
sale  of all or  substantially  all of the  assets  of the  Company,  or (C) any
merger,  consolidation,  sale of stock or other transaction or series of related
transactions  in which the holders of capital  stock of the  Company  before the
transaction  no longer  hold at least 50% of the  capital  stock of the  Company
after the transaction.

         (d)      Each  exercise  of  this  Warrant shall be deemed to have been
effected  immediately  prior to the close of  business  on the day on which this
Warrant  shall have been  surrendered  to the Company as provided in  subsection
1(a) above (the "Exercise  Date").  At such time, the person or persons in whose
name or names any  certificates  for Warrant  Shares shall be issuable upon such
exercise as provided in subsection 1(d) below shall be deemed to have become the
holder  or  holders  of  record  of  the  Warrant  Shares  represented  by  such
certificates.

         (e)      As soon as  practicable  after the exercise of this Warrant in
full or in part, and in any event within 10 days thereafter, the Company, at its
expense,  will  cause to be  issued  in the  name  of,  and  delivered  to,  the
Registered  Holder,  or as such  Holder  (upon  payment  by such  Holder  of any
applicable transfer taxes) may direct:

                  (i)  a certificate  or  certificates  for the  number  of full
Warrant  Shares to which  the  Registered  Holder  shall be  entitled  upon such
exercise  plus, in lieu of any fractional  share to which the Registered  Holder
would otherwise be entitled,  cash in an amount determined pursuant to Section 3
hereof; and

                  (ii) in case such  exercise is in part only,  a new warrant or
warrants (dated the date hereof) of like tenor,  calling in the aggregate on the
face or faces  thereof for the number of Warrant  Shares equal  (without  giving
effect to any adjustment therein) to the number of such shares called for on the
face of this Warrant minus the sum of (a) the number of such shares purchased by
the  Registered  Holder upon such exercise plus (b) the number of Warrant Shares
(if any)  covered by the  portion of this  Warrant  cancelled  in payment of the
Purchase Price payable upon such exercise pursuant to subsection 1(b) above.

         2.       Adjustments.

         (a)      Adjustment for Stock Splits and Combinations.  If  the Company
shall at any time or from time to time after the date on which this  Warrant was
first issued (the "Original Issue Date") effect a subdivision of the outstanding
Common  Stock,  the  Purchase  Price  then in  effect

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 41 of 74

immediately before that subdivision shall be proportionately  decreased.  If the
Company  shall at any time or from time to time  after the  Original  Issue Date
combine the  outstanding  shares of Common  Stock,  the  Purchase  Price then in
effect immediately  before the combination shall be  proportionately  increased.
Any  adjustment  under this  paragraph  shall  become  effective at the close of
business on the date the subdivision or combination becomes effective.

         (b)      Adjustment for Certain  Dividends and  Distributions.  In  the
event the  Company at any time,  or from time to time after the  Original  Issue
Date shall make or issue, or fix a record date for the  determination of holders
of Common Stock entitled to receive, a dividend or other distribution payable in
additional  shares of Common  Stock,  then and in each such  event the  Purchase
Price then in effect  immediately before such event shall be decreased as of the
time of such issuance or, in the event such a record date shall have been fixed,
as of the close of business on such record  date,  by  multiplying  the Purchase
Price then in effect by a fraction:

                  (1) the numerator of which shall be the total number of shares
of Common Stock  issued and  outstanding  immediately  prior to the time of such
issuance or the close of business on such record date, and

                  (2) the  denominator  of which  shall be the  total  number of
shares of Common Stock issued and outstanding  immediately  prior to the time of
such  issuance  or the close of  business on such record date plus the number of
shares of Common Stock issuable in payment of such dividend or distribution;

provided,  however,  if such record date shall have been fixed and such dividend
is not fully  paid or if such  distribution  is not fully made on the date fixed
therefor,  the Purchase Price shall be recomputed accordingly as of the close of
business on such record date and thereafter the Purchase Price shall be adjusted
pursuant to this paragraph as of the time of actual payment of such dividends or
distributions.

         (c)      Adjustment in Number of Warrant Shares. When any adjustment is
required to be made in the Purchase Price pursuant to subsections  2(a) or 2(b),
the number of Warrant Shares purchasable upon the exercise of this Warrant shall
be changed to the  number  determined  by  dividing  (i) an amount  equal to the
number of shares issuable upon the exercise of this Warrant immediately prior to
such adjustment, multiplied by the Purchase Price in effect immediately prior to
such  adjustment,  by (ii) the Purchase Price in effect  immediately  after such
adjustment.

         (d)      Adjustments for Other  Dividends  and  Distributions.  In  the
event the Company at any time or from time to time after the Original Issue Date
shall make or issue,  or fix a record date for the  determination  of holders of
Common Stock entitled to receive,  a dividend or other  distribution  payable in
securities  of the Company  (other  than  shares of Common  Stock) or in cash or
other property (other than cash out of earnings or earned surplus, determined in
accordance with generally accepted accounting principles), then and in each such
event provision  shall be made so that the Registered  Holder shall receive upon
exercise  hereof,  in addition to the number of shares of Common Stock  issuable
hereunder,  the kind and amount of  securities  of the  Company  and/or cash and
other property  which the Registered  Holder would have been entitled to receive
had this Warrant been  exercised into Common Stock on the date of such event and
had the Registered  Holder  thereafter,  during the period from the date of such
event  to  and  including  the  Exercise  Date,  retained  any  such  securities
receivable,  giving application to all adjustments called for during such period
under this Section 2 with respect to the rights of the Registered Holder.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 42 of 74

         (e)      Adjustment  for   Mergers  or  Reorganizations,  etc. If there
shall  occur  any  reorganization,  recapitalization,  consolidation  or  merger
involving  the Company in which the Common Stock is converted  into or exchanged
for  securities,  cash or other  property  (other than a transaction  covered by
subsections  2(a),  2(b) or  2(d)),  then,  following  any such  reorganization,
recapitalization,  consolidation or merger,  the Registered Holder shall receive
upon exercise  hereof the kind and amount of securities,  cash or other property
which the Registered Holder would have been entitled to receive if,  immediately
prior to such  reorganization,  recapitalization,  consolidation or merger,  the
Registered  Holder had held the number of shares of Common Stock subject to this
Warrant.  In such case,  appropriate  adjustment (as determined in good faith by
the Board of Directors of the Company)  shall be made in the  application of the
provisions set forth herein with respect to the rights and interests  thereafter
of the  Registered  Holder,  to the end that the  provisions  set  forth in this
Section 2 (including provisions with respect to changes in and other adjustments
of the Purchase Price) shall  thereafter be applicable,  as nearly as reasonably
may be,  in  relation  to any  securities,  cash or  other  property  thereafter
deliverable upon the exercise of this Warrant.

         (f)      Certificate as to Adjustments.  Upon  the occurrence  of  each
adjustment or readjustment of the Purchase Price pursuant to this Section 2, the
Company at its expense shall promptly compute such adjustment or readjustment in
accordance  with  the  terms  hereof  and  furnish  to the  Registered  Holder a
certificate  setting forth such adjustment or  readjustment  (including the kind
and amount of securities, cash or other property for which this Warrant shall be
exercisable  and the Purchase  Price) and showing in detail the facts upon which
such adjustment or readjustment  is based.  The Company shall,  upon the written
request at any time of the Registered  Holder,  furnish or cause to be furnished
to the Registered Holder a certificate setting forth (i) the Purchase Price then
in effect and (ii) the number of shares of Common Stock and the amount,  if any,
of other  securities,  cash or property  which then would be  received  upon the
exercise of this Warrant.

         3.       Fractional Shares. The Company shall not be required  upon the
exercise  of this  Warrant  to issue any  fractional  shares,  but shall make an
adjustment  therefor in cash on the basis of the Fair Market  Value per share of
Common Stock, as determined pursuant to subsection 1(b) above.

         4.       Requirements for Transfer.

                  (a) This  Warrant and the Warrant  Shares shall not be sold or
transferred  unless either (i) they first shall have been  registered  under the
Securities Act of 1933, as amended (the "Act"),  or (ii) the Company first shall
have been furnished with an opinion of legal counsel, reasonably satisfactory to
the Company (it being  stipulated  that an opinion of Hale and Dorr LLP shall be
satisfactory),  to the  effect  that such sale or  transfer  is exempt  from the
registration requirements of the Act.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 43 of 74

                  (b) Notwithstanding the foregoing,  no registration or opinion
of counsel  shall be  required  for (i) a transfer by a  Registered  Holder to a
party  specified in Section  10(b) below,  or (ii) a transfer made in accordance
with Rule 144 under the Act.

                  (c) Each certificate  representing Warrant Shares shall bear a
legend substantially in the following form:

                      "The securities  represented by this certificate have
                      not been registered under the Securities Act of 1933,
                      as amended, and may not be offered, sold or otherwise
                      transferred, pledged or hypothecated unless and until
                      such  securities are registered  under such Act or an
                      opinion of  counsel  satisfactory  to the  Company is
                      obtained to the effect that such  registration is not
                      required."

The foregoing  legend shall be removed from the  certificates  representing  any
Warrant  Shares,  at the  request  of the holder  thereof,  at such time as they
become eligible for resale pursuant to Rule 144(k) under the Act.

         5.       No Impairment.  The  Company  will  not,  by  amendment of its
charter or through reorganization,  transfer of assets,  consolidation,  merger,
dissolution, issue or sale of securities or any other voluntary action, avoid or
seek to avoid the observance or performance of any of the terms of this Warrant,
but will at all times in good faith assist in the carrying out of all such terms
and in the taking of all such action as may be necessary or appropriate in order
to protect the rights of the holder of this Warrant against impairment.

         6.       Notices of Record Date, etc.  In the event:

                  (a) the  Company  shall  take a record of the  holders  of its
Common  Stock (or other stock or  securities  at the time  deliverable  upon the
exercise of this  Warrant)  for the  purpose of  entitling  or enabling  them to
receive any dividend or other distribution, or to receive any right to subscribe
for or purchase any shares of stock of any class or any other securities,  or to
receive any other right; or

                  (b)  of  any  capital   reorganization  of  the  Company,  any
reclassification of the Common Stock of the Company, any consolidation or merger
of the Company with or into another  corporation  (other than a consolidation or
merger in which the Company is the surviving  entity and its Common Stock is not
converted  into or  exchanged  for any other  securities  or  property),  or any
transfer of all or substantially all of the assets of the Company; or

                  (c) of the voluntary or involuntary  dissolution,  liquidation
or winding-up of the Company,

then,  and in each such case, the Company will mail or cause to be mailed to the
Registered Holder a notice  specifying,  as the case may be, (i) the record date
for such dividend,  distribution or right,  and the amount and character of such
dividend,  distribution  or  right,  or (ii) the  effective  date on which  such
reorganization, reclassification,  consolidation, merger, transfer, dissolution,

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 44 of 74

liquidation or winding-up is to take place, and the time, if any is to be fixed,
as of which  the  holders  of record of  Common  Stock (or such  other  stock or
securities at the time  deliverable  upon the exercise of this Warrant) shall be
entitled  to  exchange  their  shares of Common  Stock (or such  other  stock or
securities)   for   securities   or  other   property   deliverable   upon  such
reorganization, reclassification,  consolidation, merger, transfer, dissolution,
liquidation or  winding-up.  Such notice shall be mailed at least ten days prior
to the record date or effective date for the event specified in such notice.

         7.       Reservation of Stock. The  Company  will  at all times reserve
and keep  available,  solely for issuance and delivery upon the exercise of this
Warrant,  such  number of  Warrant  Shares  and other  securities,  cash  and/or
property,  as from time to time  shall be  issuable  upon the  exercise  of this
Warrant.

         8.       Exchange of Warrants.  Upon  the  surrender  by the Registered
Holder,  properly  endorsed,  to the  Company  at the  principal  office  of the
Company,  the Company will, subject to the provisions of Section 4 hereof, issue
and deliver to or upon the order of such Holder, at the Company's expense, a new
Warrant or Warrants of like tenor,  in the name of the  Registered  Holder or as
the Registered  Holder (upon payment by the Registered  Holder of any applicable
transfer  taxes)  may  direct,  calling  in the  aggregate  on the face or faces
thereof  for the  number of shares of Common  Stock (or other  securities,  cash
and/or property) then issuable upon exercise of this Warrant.

         9.       Replacement of Warrants. Upon receipt of  evidence  reasonably
satisfactory  to the Company of the loss,  theft,  destruction  or mutilation of
this Warrant and (in the case of loss, theft or destruction) upon delivery of an
indemnity agreement (with surety if reasonably required) in an amount reasonably
satisfactory to the Company,  or (in the case of mutilation)  upon surrender and
cancellation  of this Warrant,  the Company will issue,  in lieu thereof,  a new
Warrant of like tenor.

         10.      Transfers, etc.

                  (a) The Company will maintain a register  containing  the name
and address of the Registered Holder of this Warrant.  The Registered Holder may
change its or his address as shown on the warrant  register by written notice to
the Company requesting such change.

                  (b)  Subject  to the  provisions  of  Section 4  hereof,  this
Warrant and all rights hereunder are  transferable,  in whole or in part, to any
partner, member, stockholder or affiliate of the holder, and any such transferee
shall have the rights of the  Registered  Holder to the extent of the portion of
this Warrant so transferred.  Such transfer shall be effective upon surrender of
this  Warrant  with a properly  executed  assignment  (in the form of Exhibit II
hereto)  at the  principal  office of the  Company.  Nothing  contained  in this
Section 10 shall limit the transferability of the Warrant Shares.

                  (c) Until any  transfer of this Warrant is made in the warrant
register,  the Company may treat the  Registered  Holder as the  absolute  owner
hereof for all  purposes;  provided,  however,  that if and when this Warrant is
properly  assigned in blank,  the Company  may (but shall not be  obligated  to)
treat  the  bearer  hereof  as the  absolute  owner  hereof  for  all  purposes,
notwithstanding any notice to the contrary.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 45 of 74

                  11.   Mailing  of   Notices,   etc.   All  notices  and  other
communications  from the  Company to the  Registered  Holder  shall be mailed by
first-class  certified or registered mail, postage prepaid,  to the address last
furnished to the Company in writing by the  Registered  Holder.  All notices and
other communications from the Registered Holder or in connection herewith to the
Company shall be mailed by  first-class  certified or registered  mail,  postage
prepaid,  to the Company at its principal office set forth below. If the Company
should at any time change the location of its principal  office to a place other
than as set forth below,  it shall give prompt  written notice to the Registered
Holder and  thereafter  all  references  in this  Warrant to the location of its
principal office at the particular time shall be as so specified in such notice.

                  12. No  Rights as  Shareholder.  Until  the  exercise  of this
Warrant,  the Registered  Holder shall not have or exercise any rights by virtue
hereof as a shareholder of the Company.  Notwithstanding  the foregoing,  in the
event (i) the  Company  effects a split of the Common  Stock by means of a stock
dividend and the Purchase Price of and the number of Warrant Shares are adjusted
as of the date of the distribution of the dividend (rather than as of the record
date for such dividend),  and (ii) the Registered  Holder exercises this Warrant
between the record date and the distribution  date for such stock dividend,  the
Registered  Holder shall be entitled to receive,  on the distribution  date, the
stock  dividend  with respect to the shares of Common Stock  acquired  upon such
exercise,  notwithstanding  the fact that such shares were not outstanding as of
the close of business on the record date for such stock dividend.

                  13. Change or Waiver.  Any term of this Warrant may be changed
or waived only by an  instrument  in writing  signed by the party  against which
enforcement of the change or waiver is sought.

                  14. Section Headings. The section headings in this Warrant are
for the convenience of the parties and in no way alter, modify,  amend, limit or
restrict the contractual obligations of the parties.

                  15.  Governing  Law.  This  Warrant  will be  governed  by and
construed in accordance  with the internal laws of the  Commonwealth of Virginia
(without reference to the conflicts of law provisions thereof).



<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 46 of 74

EXECUTED as of the Date of Issuance indicated above.

                                            ESSEX CORPORATION

                                            By:
                                               ---------------------------------

[Corporate Seal]                            Title:
                                                  ------------------------------

ATTEST:

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



<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 47 of 74

                                                                       EXHIBIT I

                                  PURCHASE FORM

To:                                                    Dated:
    -----------------------                                  -------------------

The  undersigned,  pursuant to the provisions set forth in the attached  Warrant
(No.), hereby irrevocably elects to purchase (check applicable box):

O   _____ shares of the Common Stock covered by such Warrant; or

O   the   maximum   number  of shares of Common  Stock  covered by such  Warrant
    pursuant to the cashless exercise procedure set forth in Section 1(b).

The  undersigned  herewith  makes  payment of the full  purchase  price for such
shares at the price per share provided for in such Warrant,  which is $________.
Such payment takes the form of (check applicable box or boxes):

O   $______ in lawful money of the United States; and/or

O   the   cancellation   of  such   portion   of  the  attached  Warrant  as  is
    exercisable  for a total of _____ Warrant  Shares (using a Fair Market Value
    of $_____ per share for purposes of this calculation); and/or

O   the  cancellation  of  such  number  of Warrant  Shares as is necessary,  in
    accordance  with  the formula set forth in Section  1(b),  to exercise  this
    Warrant with respect  to the maximum  number of Warrant  Shares  purchasable
    pursuant to the cashless exercise procedure set forth in Section 1(b).

                        Signature:
                                  --------------------------------------

                        Address:
                                  --------------------------------------

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


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 48 of 74

                                                                      EXHIBIT II

                                 ASSIGNMENT FORM

FOR  VALUE  RECEIVED,   ________________________________________  hereby  sells,
assigns and  transfers all of the rights of the  undersigned  under the attached
Warrant  (No. _) with  respect to the number of shares of Common  Stock  covered
thereby set forth below, unto:

Name of Assignee               Address                         No. of Shares




Dated:                                    Signature:
      --------------------------                     ---------------------------

Signature Guaranteed:

By:
   -----------------------------

The signature should be guaranteed by an eligible guarantor  institution (banks,
stockbrokers, savings and loan associations and credit unions with membership in
an approved  signature  guarantee  medallion  program)  pursuant to Rule 17Ad-15
under the Securities Exchange Act of 1934.


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 49 of 74

                                    EXHIBIT 3

                         SHAREHOLDERS' VOTING AGREEMENT

         This  Agreement  dated as of  September  8, 2000 is entered into by and
among GEF Optical Investment  Company,  LLC ("Global") and Networking  Ventures,
L.L.C. ("NV") (Global and NV are referred to individually as a "Shareholder" and
collectively as the "Shareholders")

                                    Recitals:

         The  Shareholders  own  certain  outstanding  shares  of the  Series  B
Convertible  Preferred  Stock  ("Series B Preferred")  of Essex  Corporation,  a
Virginia corporation (the "Company"); and

         The Shareholders  wish to provide for certain voting  agreements in the
manner set forth below.

         In  consideration  of the mutual covenants  contained  herein,  and for
other  valuable  consideration,  receipt  of which is hereby  acknowledged,  the
parties hereto agree as follows:

         1.       Voting of Shares.

                  (a) In any and  all  elections  of  directors  of the  Company
(whether  at a  meeting  or by  written  consent  in  lieu of a  meeting),  each
Shareholder  shall vote or cause to be voted all Shares (as defined in Section 2
below) owned by him or it, or over which it has voting  control,  and  otherwise
use  his or its  respective  best  efforts,  so as to  designate  two  directors
designated by Global,  two directors  designated by NV and one director mutually
acceptable to the Shareholders. The directors initially designated by Global are
H. Jeffrey Leonard and Marie Minton;  the directors  initially  designated by NV
are John Hannon and Caroline  Pisano.  No  Shareholder  shall vote to remove any
director, except for bad faith or willful misconduct,  without the prior written
consent of the other Shareholder.

                  (b) In any matter to be voted on at a meeting of  Shareholders
of the  Company  or by  written  consent  in lieu of a meeting  (other  than the
election of directors),  each Shareholder  shall consult with the other prior to
such  vote or  consent  and  each  Shareholder  shall  cast its vote or grant or
withhold its consent in the manner mutually  agreed by the  Shareholders at such
time.

                  (c) In any matter to be voted upon by the Company's directors,
whether at a meeting of  directors or by action of directors in lieu of meeting,
each Shareholder shall cause the directors designated by it to consult with each
other  prior  to such  vote or  consent  and to vote or  consent  in the  manner
mutually agreed to by such directors at that time.

         2.       Shares. "Shares" shall mean and include any and all shares  of
Series B Preferred  and/or shares of capital  stock of the Company,  by whatever
name called,  which carry voting rights  (including voting rights which arise by
reason of default) and shall  include any such shares now owned or  subsequently
acquired by a Shareholder,  however acquired, including without limitation stock
splits and stock dividends.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 50 of 74

         3.  Termination.  This Agreement shall terminate in its entirety on the
second anniversary of the date of this Agreement.

         4. No Revocation.  The voting  agreements  contained herein are coupled
with an interest and may not be revoked, except by an amendment, modification or
termination  effected in  accordance  with Section 3 or 6(e) hereof.  Nothing in
this Section 4 shall be construed  as limiting  the  provisions  of Section 3 or
6(e) hereof.

         5. Transfers of Rights.  Any transferee to whom Shares are  transferred
by a Shareholder,  whether voluntarily or by operation of law, shall be bound by
the voting obligations imposed upon the transferor under this Agreement,  to the
same  extent  as  if  such  transferee  were  a  Shareholder  hereunder  and  no
Shareholder shall transfer any Shares unless the transferee agrees in writing to
be bound by this Agreement.

         6. General.

         7. Severability. The invalidity or unenforceability of any provision of
this  Agreement  shall not affect the  validity or  enforceability  of any other
provision of this Agreement.

         8. Specific Performance. In addition to any and all other remedies that
may be  available  at law in the  event of any  breach of this  Agreement,  each
Shareholder  shall be entitled to specific  performance  of the  agreements  and
obligations of the Shareholders  hereunder and to such other injunctive or other
equitable relief as may be granted by a court of competent jurisdiction.

         9. Governing Law. This Agreement  shall be governed by and construed in
accordance  with the  internal  laws of the  Commonwealth  of Virginia  (without
reference to the conflicts of law provisions thereof).

         10. Notices. All notices, requests,  consents, and other communications
under this Agreement  shall be in writing and shall be deemed  delivered (i) two
business days after being send by registered or certified  mail,  return receipt
requested,  postage  prepaid  or (ii) one  business  day after  being sent via a
reputable  nationwide  overnight courier service  guaranteeing next business day
delivery,  in each case to the  intended  recipient  at its address set forth in
Schedule  A hereto,  or at such  other  address  or  addresses  as may have been
furnished to the other parties hereto in writing by such Shareholder.

         Any party may give any notice, request,  consent or other communication
under this  Agreement  using any other  means  (including,  without  limitation,
personal delivery,  messenger service,  telecopy, first class mail or electronic
mail),  but no such notice,  request,  consent or other  communication  shall be
deemed to have been duly given  unless and until it is actually  received by the
party for whom it is  intended.  Any  party  may  change  the  address  to which
notices,  requests,  consents  or  other  communications  hereunder  are  to  be
delivered  by giving  the other  parties  notice in the manner set forth in this
Section.

         11.  Complete  Agreement;  Amendments.  This Agreement  constitutes the
entire  agreement and  understanding  of the parties  hereto with respect to the
subject matter hereof,  and

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 51 of 74

supersedes  all prior  agreements  and  understandings  relating to such subject
matter.  No amendment or termination of, or waiver under,  any provision of this
Agreement shall be valid unless in writing and signed by the Shareholders.

         12.  Pronouns.  Whenever the context may require,  any pronouns used in
this Agreement  shall include the  corresponding  masculine,  feminine or neuter
forms, and the singular form of nouns and pronouns shall include the plural, and
vice versa.

         13. Counterparts;  Facsimile Signatures. This Agreement may be executed
in any number of counterparts,  each of which shall be deemed to be an original,
and all of which  together  shall  constitute  one and the same  document.  This
Agreement may be executed by facsimile signatures.

         14. Section  Headings.  The section headings are for the convenience of
the  parties  and  in no  way  alter,  modify,  amend,  limit  or  restrict  the
contractual obligations of the parties.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 52 of 74

         IN WITNESS  WHEREOF,  this  Agreement  has been executed by the parties
hereto as of the day and year first above written.

                                     SHAREHOLDERS:

                                     GEF OPTICAL INVESTMENT
                                     COMPANY, LLC

                                     By:
                                        ----------------------------------------

                                        Name:
                                              ----------------------------------

                                        Title:
                                              ----------------------------------

                                     NETWORKING VENTURES, L.L.C.

                                     By:
                                        ----------------------------------------

                                        Name:
                                              ----------------------------------

                                        Title:
                                              ----------------------------------


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 53 of 74

                                    EXHIBIT A

                                  Shareholders

GEF Optical Investment Company, LLC
1225 I Street
Suite 900
Washington, DC 20005

Networking Ventures, L.L.C.
8970 Route 108
Suite B
Columbia, Maryland 21045


<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 54 of 74

                                    EXHIBIT 4


                              ARTICLES OF AMENDMENT
                                       OF
                                ESSEX CORPORATION

To the State Corporation Commission
Commonwealth of Virginia

         The following  Articles of Amendment are hereby  submitted  pursuant to
the  provisions  of  the  Virginia  Stock  Corporation  Act  on  behalf  of  the
corporation hereinafter named.

         I.  The  name  of  the  corporation  (hereinafter  referred  to as  the
"Corporation") is Essex Corporation.

         II. Article (c) of the Articles of  Incorporation of the Corporation is
hereby amended to designate a new series of the Corporation's Preferred Stock to
be known as "Series B  Convertible  Preferred  Stock" by adding the following as
new Section (c)(B):

             (c)(B) Series B Convertible  Preferred Stock. Five Hundred Thousand
(500,000) shares of Preferred Stock of the Corporation are hereby  designated as
Series B Convertible  Preferred Stock ("Series B Preferred").  The  preferences,
privileges  and  relative  rights  relating  to the  Series B  Preferred  are as
follows:

                    1. Dividend Provisions. The Corporation shall not declare or
pay any  distributions  on shares of Common  Stock  (other  than a  distribution
described in Section  3(d)(i) below) until the holders of the Series B Preferred
then outstanding shall have first received,  or simultaneously  receive,  out of
any assets legally  available  therefor a distribution on each outstanding share
of Series B Preferred  in an amount at least equal to the product of (i) the per
share amount,  if any, of the dividends or other  distributions  to be declared,
paid or set aside for the Common  Stock,  multiplied by (ii) the number of whole
shares of Common  Stock  into which  such  share of Series B  Preferred  is then
convertible. Such dividends shall not be cumulative.

                    2. Liquidation. In the event of any liquidation, dissolution
or winding up of the Corporation, either voluntary or involuntary, the assets of
the Corporation  available for distribution to stockholders shall be distributed
among the holders of Common  Stock and Series B Preferred  pro rata based on the
number of shares of Common  Stock  held by each such  holder or into  which such
holder's shares of Series B Preferred are then convertible.

                    3. Conversion.  The holders of Series B Preferred shall have
conversion rights as follows (the "Conversion Rights"):

                       (a) Right to Convert. Subject to Section 3(c), each share
of Series B Preferred shall be convertible, at the option of the holder thereof,
at any time  after the date of  issuance  of such  share,  at the  office of the
Corporation or any transfer  agent for such

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 55 of 74

stock,  into four (4) fully paid and  nonassessable  shares of Common Stock (the
"Series B Conversion  Rate").  The Series B Conversion  Rate shall be subject to
adjustment as set forth in Section 3(d).

                       (b)  Automatic   Conversion.   Each  share  of  Series  B
Preferred  shall  automatically  be converted into shares of Common Stock at the
Series B  Conversion  Rate at the time in effect  for such  share on the  second
anniversary of the filing of these Articles of Amendment with the Virginia State
Corporation Commission.

                       (c) Mechanics of Conversion.  Before any holder of Series
B Preferred  shall be entitled to convert the same into shares of Common  Stock,
he shall surrender the certificate or certificates  therefor,  duly endorsed, at
the office of the Corporation or of any transfer agent for such series of Series
B Preferred,  and shall give written notice to the  Corporation at its principal
corporate  office,  of the election to convert the same and shall state  therein
the name or names in which the certificate or certificates  for shares of Common
Stock are to be issued. The Corporation shall, immediately thereafter, issue and
deliver at such office to such holder of Series B  Preferred,  or to the nominee
or nominees of such holder,  a  certificate  or  certificates  for the number of
shares of Common Stock to which such holder shall be entitled as aforesaid. Such
conversion shall be deemed to have been made  immediately  prior to the close of
business on the date of such surrender of the shares of Series B Preferred to be
converted,  and the person or persons  entitled  to receive the shares of Common
Stock  issuable  upon such  conversion  shall be treated for all purposes as the
record  holder or holders of such shares of Common Stock as of such date. If the
conversion is in connection with an acquisition or an  underwritten  offering of
securities  registered  pursuant to the Securities Act of 1933, as amended,  the
conversion  may, at the option of any holder  tendering  such Series B Preferred
for  conversion,  be  conditioned  upon the closing of such  acquisition  or the
closing  with  the  underwriters  of the  sale of  securities  pursuant  to such
offering,  in which event the  person(s)  entitled to receive  Common Stock upon
conversion of such Series B Preferred shall not be deemed to have converted such
Series B Preferred until immediately prior to the closing of such acquisition or
such sale of securities.

                       (d) Conversion Rate Adjustments of Series B Preferred for
Certain Splits and  Combinations.  The Series B Conversion Rate shall be subject
to adjustment from time to time as follows:

                           (i)  Stock  Splits  and  Dividends.  In the event the
Corporation  should at any time or from  time to time fix a record  date for the
effectuation of a split or subdivision of the outstanding shares of Common Stock
or the  determination  of holders of Common Stock entitled to receive a dividend
or other  distribution  payable in  additional  shares of Common  Stock or other
securities  or rights  convertible  into,  or  entitling  the holder  thereof to
receive directly or indirectly,  additional shares of Common Stock  (hereinafter
referred to as "Common Stock Equivalents")  without payment of any consideration
by such holder for the  additional  shares of Common  Stock or the Common  Stock
Equivalents  (including  the  additional  shares of Common Stock  issuable  upon
conversion  or exercise  thereof),  then, as of such record date (or the date of
such dividend,  distribution,  split or subdivision if no record date is fixed),
the Series B Conversion Rate shall be appropriately  adjusted so that the number
of shares of Common  Stock  issuable  on  conversion  of each  share of Series B
Preferred  shall be increased in proportion to such increase of the aggregate of
shares of Common  Stock  outstanding  and the  number  of shares  issuable  with
respect to such Common Stock Equivalents.



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CUSIP No. 296744 10 5                     13D                      Page 56 of 74

                         (ii)  Reverse  Stock Splits. If the number of shares of
Common  Stock  outstanding  at any time is  decreased  by a  combination  of the
outstanding  shares of Common  Stock,  then,  following  the record date of such
combination,  the Series B Conversion  Rate for each share of Series B Preferred
shall be  appropriately  adjusted  so that the number of shares of Common  Stock
issuable on conversion of each share of Series B Preferred shall be decreased in
proportion to such decrease in outstanding shares of Common Stock.

                     (e) Other Distributions. In the event the Corporation shall
declare a  distribution  payable in  securities of other  persons,  evidences of
indebtedness issued by the Corporation or other persons,  assets (excluding cash
dividends)  or options or rights then, in each such case for the purpose of this
Section  3(e),  the  holders  of  Series  B  Preferred  shall be  entitled  to a
proportionate  share of any such distribution as though they were the holders of
the number of shares of Common Stock of the Corporation  into which their shares
of Series B  Preferred  are  convertible  as of the  record  date  fixed for the
determination  of the  holders of Common  Stock of the  Corporation  entitled to
receive such distribution.

                     (f) Mergers,   etc.  If,  at any time or from time to time,
there shall be a merger or consolidation of the Corporation with or into another
corporation,  or  the  sale  of all or  substantially  all of the  Corporation's
properties  and assets to any other  person and  entity,  then as a part of such
reorganization,  merger,  consolidation or sale, provision shall be made so that
the holder of the Series B  Preferred  shall  thereafter  be entitled to receive
upon conversion of the Series B Preferred, the number of shares of capital stock
or  other  securities  or  property  of the  Corporation,  or of  the  successor
corporation  resulting from such merger or  consolidation  or sale, to which the
holder of shares of Common Stock  deliverable  upon  conversion  would have been
entitled on such  reorganization,  merger,  consolidation,  or sale. In any such
case,  appropriate adjustment shall be made in the application of the provisions
of this  section  with  respect  to the  rights of the  holders  of the Series B
Preferred after the  reorganization,  merger,  consolidation  or sale to the end
that the  provisions  of this  section  (including  adjustment  of the  Series B
Conversion  Rate then in  effect  and the  number  of  shares  of  Common  Stock
receivable upon conversion of the Series B Preferred)  shall be applicable after
that event as nearly equivalent hereto as may be practicable.

                     (g) Recapitalizations.  If at any time or from time to time
there shall be a recapitalization of the Common Stock (other than a subdivision,
combination  or merger  or other  transaction  provided  for  elsewhere  in this
Section 3) provision shall be made so that the holders of the Series B Preferred
shall  thereafter  be  entitled  to receive  upon  conversion  of such  Series B
Preferred  the number of shares of stock or other  securities or property of the
Corporation  or otherwise,  to which a holder of Common Stock  deliverable  upon
conversion would have been entitled on such recapitalization.  In any such case,
appropriate  adjustment  shall be made in the  application  of the provisions of
this  Section 3 with  respect  to the  rights of the  holders  of such  Series B
Preferred  after the  recapitalization  to the end that the  provisions  of this
Section 3 (including  adjustment of the Series B Conversion  Rate then in effect
and the number of shares purchasable upon conversion of such Series B Preferred)
shall be applicable after that event and be as nearly equivalent as practicable.

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CUSIP No. 296744 10 5                     13D                      Page 57 of 74

                     (h) No Impairment.  The Corporation  will not, by amendment
of   its   Articles   of   Incorporation   or   through   any    reorganization,
recapitalization,  transfer of assets, consolidation, merger, dissolution, issue
or sale of securities or any other voluntary action,  avoid or seek to avoid the
observance  or  performance  of any of the  terms to be  observed  or  performed
hereunder by the Corporation,  but will at all times in good faith assist in the
carrying  out of all the  provisions  of this Section 3 and in the taking of all
such  action  as may be  necessary  or  appropriate  in  order  to  protect  the
Conversion Rights of the holders of Series B Preferred against impairment.

                     (i) No Fractional Shares and Certificate as to Adjustments.

                         (i)  No fractional  shares  shall  be  issued  upon the
conversion  of any share or shares of the Series B Preferred,  and the number of
shares of Common Stock to be issued shall be rounded to the nearest whole share.
The number of shares  issuable upon such  conversion  shall be determined on the
basis of the total  number of shares of Series B Preferred  the holder is at the
time  converting  into  Common  Stock and the  number of shares of Common  Stock
issuable upon such aggregate conversion.

                         (ii) Upon   the   occurrence  of  each   adjustment  or
readjustment  of the Series B  Conversion  Rate  pursuant to this Section 3, the
Corporation,   at  its  expense,  shall  promptly  compute  such  adjustment  or
readjustment in accordance with the terms hereof and prepare and furnish to each
holder of Series B Preferred a  certificate  setting  forth such  adjustment  or
readjustment  and  showing in detail the facts  upon  which such  adjustment  or
readjustment is based.  The Corporation  shall,  upon the written request at any
time of any holder of shares of a series of Series B Preferred, furnish or cause
to be  furnished  to such  holder  a like  certificate  setting  forth  (A) such
adjustment and  readjustment,  (B) the new Series B Conversion Rate, and (C) the
number of shares of Common Stock and the amount, if any, of other property which
at the  time  would  be  received  upon the  conversion  of a share of  Series B
Preferred.

                     (j) Notices of Record  Date.  In the event of any taking by
the  Corporation  of a record of the holders of any class of securities  for the
purpose of  determining  the  holders  thereof  who are  entitled to receive any
dividend  (other  than a cash  dividend)  or other  distribution,  any  right to
subscribe for, purchase or otherwise acquire any shares of stock of any class or
any other securities or property, or to receive any other right, the Corporation
shall send to each holder of Series B Preferred, at least ten (10) days prior to
the date  specified  therein,  a notice  specifying  the date on which  any such
record is to be taken for the purpose of such dividend,  distribution  or right,
and the amount and character of such dividend, distribution or right.

                     (k) Reservation   of Stock  Issuable Upon  Conversion.  The
Corporation  shall at all times reserve and keep available out of its authorized
but unissued  shares of Common  Stock,  solely for the purpose of effecting  the
conversion  of the shares of Series B  Preferred,  such  number of its shares of
Common Stock as shall from time to time be sufficient  to effect the  conversion
of all  outstanding  shares of such Series B  Preferred;  and if at any time the
number of authorized but unissued shares of Common Stock shall not be sufficient
to effect the conversion of all then  outstanding  shares of Series B Preferred,
in addition to such other  remedies as shall be  available to the holder of such
Series B Preferred,  the Corporation  will take

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 58 of 74

such  corporate  action as may, in the opinion of its  counsel,  be necessary to
increase its  authorized  but unissued  shares of Common Stock to such number of
shares as shall be sufficient for such purposes,  including, without limitation,
engaging in best  efforts to obtain the  requisite  shareholder  approval of any
necessary amendment to the Corporation's Articles of Incorporation.

                     (l) Notices.  Any notice required by the provisions of this
Section 3 to be given to the  holders of shares of Series B  Preferred  shall be
deemed  given  if  delivered  to such  shareholder  by a  nationally  recognized
overnight  delivery  service  at  his  address  appearing  on the  books  of the
Corporation.

               4.    Voting Rights.

                     (a)  Except as  provided  in Section  4(b) or Section  4(c)
below,  the holders of record of shares of Series B Preferred  shall be entitled
to such  number of votes for each share of Series B  Preferred  standing in each
such person's name on the stock transfer  records of the Corporation as shall be
necessary to entitle the holders of all shares of Series B Preferred to vote, in
the aggregate, 51% of the total voting power of all holders of all capital stock
of the  Corporation.  Promptly  following  the fixing of a record  date for each
annual or special  meeting of  shareholders or prior to the taking of any action
by written  consent,  the Board of Directors of the  Corporation  (the  "Board")
shall  determine  the number of votes per share of Series B Preferred  that each
holder of record of Series B Preferred  shall be  entitled to cast to  implement
the foregoing voting  provisions.  The  determination of such number of votes by
the Board shall be final and shall be set forth in the notice of such meeting of
shareholders  or notice of consent  delivered to the holders of capital stock of
the Corporation.

                     (b)  Notwithstanding  the provisions of Section 4(a) above,
on any matter set forth in clauses (i) or (ii) below submitted for consideration
or action by the  shareholders  at any  meeting of  shareholders  (or by written
consent of  shareholders  in lieu of meeting) each holder of record of shares of
Series B Preferred  shall be entitled to one vote for each share of Common Stock
into which such holder's  shares of Series B Preferred are convertible as of the
record date for determining shareholders entitled to vote on such matter:

                          (i)  any sale  of  all  or  substantially  all  of the
assets of the Corporation which values the Corporation at less than $50,000,000;
or

                          (ii) any  merger  (other  than a merger  in which  the
holders of capital stock of the Corporation  before the transaction  continue to
hold  more  than  50%  of  the  capital  stock  of  the  Corporation  after  the
transaction) or  consolidation  to which the Corporation is a party which values
the Corporation at less than $50,000,000.

         Insofar  as the  consideration  paid in a sale  of  assets,  merger  or
consolidation  referenced in clause (i) or (ii) above consists of property other
than cash,  the value of the  Corporation  shall be  computed  based on the fair
market value of such property as of the applicable record date. In the event any
consideration  in  such  transaction  is to be paid on a  deferred  basis,  such
consideration  shall be valued on a present  value  basis,  applying  a discount
factor of 8%. Any  dispute  concerning  valuation  of the  Corporation  shall be
resolved by an investment banking firm selected by the Board.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 59 of 74

                          (c)  Notwithstanding  the  provisions  of Section 4(a)
above,  each holder of record of shares of Series B Preferred  shall be entitled
to one vote for each share of Common  Stock into which such  holder's  shares of
Series B  Preferred  are  convertible  at such time as the  holders  of Series B
Preferred  default  beyond  applicable  grace and cure periods on any obligation
they have to  purchase  Series B Preferred  after the date of these  Articles of
Amendment.

         III. The capital stock of the Corporation shall have no par value.

         IV.  The    date   of   adoption   of   the   amendments   herein   was
_________________,  2000.  Such  amendments  were duly  adopted  by the Board of
Directors of the Corporation at a meeting held on _____________,  2000, pursuant
to  the  provisions  of  the  Virginia  Stock  Corporation  Act.  The  foregoing
amendments do not require shareholder approval.

         IN WITNESS  WHEREOF,  Essex  Corporation  has caused these  Articles of
Amendment  to be  executed by its  President  and  attested to by its  Assistant
Secretary as of this __ day of _____________, 2000.

                                       ESSEX CORPORATION



                                       By:

                                                                    , President

ATTEST:

--------------------------------------
                 , Assistant Secretary


<PAGE>


CUSIP No. 296744 10 5                     13D                      Page 60 of 74

                                    EXHIBIT 5

                                ESSEX CORPORATION

                          REGISTRATION RIGHTS AGREEMENT

This Agreement  dated as of September 7, 2000 is entered into by and among Essex
Corporation,  a Virginia  corporation (the  "Company"),  and the individuals and
entities listed on Exhibit A attached hereto (the "Purchasers").

                                    Recitals

WHEREAS,  the Company and the Purchasers have entered into a Securities Purchase
Agreement of even date herewith (the "Purchase Agreement"); and

WHEREAS,   the  Company  and  the  Purchasers  desire  to  provide  for  certain
arrangements  with respect to the registration of shares of capital stock of the
Company under the Securities Act of 1933;

NOW, THEREFORE,  in consideration of the mutual promises and covenants contained
in this Agreement, the parties hereto agree as follows:

1.       Certain Definitions.

As used in  this  Agreement,  the  following  terms  shall  have  the  following
respective meanings:

                  "Commission" means the Securities and Exchange Commission,  or
any other federal agency at the time administering the Securities Act.

                  "Common Stock" means the common stock of the Company.

                  "Exchange Act" means the  Securities  Exchange Act of 1934, as
amended, or any successor federal statute,  and the rules and regulations of the
Commission  issued  under such Act, as they each may,  from time to time,  be in
effect.

                  "Initiating  Holders"  means  the  Stockholders  initiating  a
request for registration  pursuant to Section 2.1(a) or 2.1(b),  as the case may
be.

                  "Other  Holders"  shall  mean  holders  of  securities  of the
Company  (other than the  Stockholders)  who are entitled,  by contract with the
Company, to have securities included in a Registration Statement.

                  "Prospectus" means the prospectus included in any Registration
Statement,  as amended or supplemented by an amendment or prospectus supplement,
including post-effective  amendments, and all material incorporated by reference
or deemed to be incorporated by reference in such Prospectus.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 61 of 74

                  "Registration  Statement" means a registration statement filed
by the Company with the Commission for a public  offering and sale of securities
of the Company (other than a registration  statement on Form S-8 or Form S-4, or
their  successors,  or any other  form for a  similar  limited  purpose,  or any
registration  statement  covering  only  securities  proposed  to be  issued  in
exchange for securities or assets of another corporation).

                  "Registration   Expenses"  means  the  expenses  described  in
Section 2.4.

                  "Registrable  Shares"  means (i) the  shares  of Common  Stock
issued or issuable  upon  conversion  of the  Shares,  (ii) the shares of Common
Stock issued or issuable  upon exercise of the Warrants  issued  pursuant to the
Purchase  Agreement and (iii) any other shares of Common Stock issued in respect
of such shares  (because of stock splits,  stock  dividends,  reclassifications,
recapitalizations,  or similar events); provided, however, that shares of Common
Stock which are Registrable Shares shall cease to be Registrable Shares upon (i)
any sale pursuant to a  Registration  Statement or Rule 144 under the Securities
Act or (ii) any sale in any  manner to a person or  entity  which,  by virtue of
Section 3 of this  Agreement,  is not  entitled  to the rights  provided by this
Agreement.  Wherever reference is made in this Agreement to a request or consent
of holders of a certain  percentage of Registrable  Shares, the determination of
such percentage shall include shares of Common Stock issuable upon conversion of
the Shares even if such conversion has not been effected.

                  "Securities Act" means the Securities Act of 1933, as amended,
or  any  successor  federal  statute,  and  the  rules  and  regulations  of the
Commission  issued  under such Act, as they each may,  from time to time,  be in
effect.

                  "Selling Stockholder" means any Stockholder owning Registrable
Shares included in a Registration Statement.

                  "Shares"  shall  mean  the  Preferred  Stock  sold  under  the
Purchase Agreement.

                  "Stockholders"   means  the  Purchasers  and  any  persons  or
entities to whom the rights granted under this Agreement are  transferred by any
Purchasers, their successors or assigns pursuant to Section 3 hereof.

         2.       Registration Rights

                  2.1      Required Registrations.

                           (a) At any time after June 30, 2001, a Stockholder or
Stockholders  holding in the  aggregate at least 51% of the  Registrable  Shares
then  outstanding  may  request,  in  writing,   that  the  Company  effect  the
registration  on Form S-1 or Form  S-2 (or any  successor  form) of  Registrable
Shares owned by such Stockholder or Stockholders having an aggregate value of at
least $1,000,000 (based on the then current market price or fair value).

                           (b) At any time after the Company becomes eligible to
file a  Registration  Statement on Form S-3 (or any  successor  form relating to
secondary offerings),  a Stockholder or Stockholders holding in the aggregate at
least 51% of the Registrable  Shares then  outstanding may request,  in writing,
that the Company effect the  registration on Form S-3 (or such successor  form),
of Registrable Shares having an aggregate value of at least $1,000,000 (based on
the then current public market price).

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 62 of 74

                           (c) Upon  receipt  of any  request  for  registration
pursuant to this Section 2, the Company shall  promptly  give written  notice of
such proposed  registration to all other  Stockholders.  Such Stockholders shall
have the right, by giving written notice to the Company within 30 days after the
Company provides its notice, to elect to have included in such registration such
of their  Registrable  Shares as such Stockholders may request in such notice of
election, subject in the case of an underwritten offering to the approval of the
managing underwriter as provided in Section 2.1(d) below. Thereupon, the Company
shall,  as  expeditiously  as  possible,  use its best  efforts  to  effect  the
registration on an appropriate registration form of all Registrable Shares which
the Company has been requested to so register  (provided,  however,  that in the
case of a registration  requested under Section 2.1(b), the Company will only be
obligated to effect such registration on Form S-3 (or any successor form)).

                           (d) If the  Initiating  Holders  intend to distribute
the  Registrable  Shares  covered by their request by means of an  underwriting,
they shall so advise the  Company as a part of their  request  made  pursuant to
Section  2.1(a) or (b), as the case may be, and the Company  shall  include such
information in its written notice  referred to in Section  2.1(c).  The right of
any other  Stockholder to include its  Registrable  Shares in such  registration
pursuant to Section 2.1(a) or (b), as the case may be, shall be conditioned upon
such other  Stockholder's  participation  in such  underwriting on the terms set
forth herein. If the managing underwriter  determines that the marketing factors
require a limitation of the number of shares to be  underwritten,  the number of
Registrable Shares to be included in a Registration  Statement filed pursuant to
this Section 2.1,  shall be reduced pro rata among the  requesting  Stockholders
based on the quotient of (1) the total Registrable  Shares to be included in the
Registration  Statement,  divided by (2) the total number of Registrable  Shares
that requested registration.

                           (e) The  Initiating  Holders  shall have the right to
select the  managing  underwriter(s)  for any  underwritten  offering  requested
pursuant to Section 2.1(a) or (b), subject to the approval of the Company, which
approval will not be unreasonably withheld.

                           (f) The Company  shall not be required to effect more
than two  registrations  pursuant to Section  2.1(a).  In addition,  the Company
shall not be required to effect any  registration  on Form S-3 or any  successor
form relating to secondary offerings more than once in any twelve-month  period.
For purposes of this  Section  2.1(f),  a  Registration  Statement  shall not be
counted  until  such  time as such  Registration  Statement  has  been  declared
effective  by the  Commission  (unless the  Initiating  Holders  withdraw  their
request for such registration (other than as a result of information  concerning
the  business or financial  condition of the Company  which is made known to the
Stockholders  after the date on which such registration was requested) and elect
not to pay the  Registration  Expenses  therefor  pursuant to Section 2.4).  For
purposes of this Section 2.1(f),  a Registration  Statement shall not be counted
if, as a result of an exercise of the underwriter's  cut-back  provisions,  less
than 50% of the total  number  of  Registrable  Shares  that  Stockholders  have
requested to be included in such Registration Statement are so included.

<PAGE>

CUSIP No. 296744 10 5                     13D                      Page 63 of 74

                           (g)  If at  the  time  of  any  request  to  register
Registrable  Shares by  Initiating  Holders  pursuant to this  Section  2.1, the
Company is engaged or has plans to engage in a registered  public offering or is
engaged in any other  activity  which,  in the good faith  determination  of the
Company's  Board of  Directors,  would be  adversely  affected by the  requested
registration,  then the  Company may at its option  direct that such  request be
delayed  for a period  not in excess  of 90 days from the date of such  request,
such right to delay a request to be  exercised by the Company not more than once
in any 12-month period.

                  2.2      Incidental Registration.

                           (a)   Whenever   the  Company   proposes  to  file  a
Registration  Statement  (other than a Registration  Statement filed pursuant to
Section 2.1) at any time and from time to time,  it will,  prior to such filing,
give written  notice to all  Stockholders  of its intention to do so;  provided,
that no such  notice need be given if no  Registrable  Shares are to be included
therein as a result of a determination of the managing  underwriter  pursuant to
Section 2.2(b).  Upon the written request of a Stockholder or Stockholders given
within 20 days after the Company provides such notice (which request shall state
the intended  method of disposition  of such  Registrable  Shares),  the Company
shall use its best efforts to cause all Registrable Shares which the Company has
been requested by such  Stockholder or Stockholders to register to be registered
under the Securities  Act to the extent  necessary to permit their sale or other
disposition in accordance with the intended methods of distribution specified in
the request of such Stockholder or Stockholders; provided that the Company shall
have the right to postpone or withdraw  any  registration  effected  pursuant to
this Section 2.2 without obligation to any Stockholder.

                           (b) If the  registration  for which the Company gives
notice pursuant to Section 2.2(a) is a registered  public offering  involving an
underwriting,  the  Company  shall so advise the  Stockholders  as a part of the
written notice given pursuant to Section 2.2(a). In such event, the right of any
Stockholder to include its Registrable  Shares in such registration  pursuant to
Section 2.2 shall be conditioned upon such  Stockholder's  participation in such
underwriting  on the terms set  forth  herein.  All  Stockholders  proposing  to
distribute  their  securities  through  such  underwriting  shall  enter into an
underwriting  agreement in customary form with the  underwriter or  underwriters
selected for the  underwriting by the Company,  provided that such  underwriting
agreement shall not provide for  indemnification or contribution  obligations on
the  part  of  Stockholders  materially  greater  than  the  obligations  of the
Stockholders  pursuant to Section 2.5.  Notwithstanding  any other  provision of
this Section 2.2, if the managing  underwriter  determines that the inclusion of
all shares requested to be registered  would adversely affect the offering,  the
Company  may  limit the  number of  Registrable  Shares  to be  included  in the
registration  and  underwriting.  The  Company  shall so advise  all  holders of
Registrable  Shares requesting  registration,  and the number of shares that are
entitled to be included in the registration and underwriting  shall be allocated
in the  following  manner.  The  securities of the Company held by holders other
than Stockholders and Other Holders shall be excluded from such registration and
underwriting to the extent deemed advisable by the managing underwriter, and, if
a further  limitation on the number of shares is required,  the number of shares
that may be included in such  registration and  underwriting  shall be allocated
among all Stockholders and Other Holders requesting  registration in proportion,
as nearly as practicable, to the respective number of shares of Common Stock (on
an as-converted  basis) which they held at the time the

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CUSIP No. 296744 10 5                     13D                      Page 64 of 74

Company gives the notice  specified in Section 2.2(a),  provided that the number
of Registrable  Shares permitted to be included therein shall in any event be at
least 50% of the  securities  included  therein  that are not being sold for the
account of the Company (based on aggregate market values). If any Stockholder or
Other Holder would thus be entitled to include more  securities than such holder
requested to be registered, the excess shall be allocated among other requesting
Stockholders and Other Holders pro rata in the manner described in the preceding
sentence. If any holder of Registrable Shares or any officer,  director or Other
Holder disapproves of the terms of any such underwriting,  such person may elect
to withdraw  therefrom  by written  notice to the Company,  and any  Registrable
Shares or other securities excluded or withdrawn from such underwriting shall be
withdrawn from such registration.

                  2.3      Registration Procedures.

                           (a) If and  whenever  the  Company is required by the
provisions of this Agreement to use its best efforts to effect the  registration
of any Registrable Shares under the Securities Act, the Company shall:

                               (i)   file with  the  Commission  a  Registration
Statement  with respect to such  Registrable  Shares and use its best efforts to
cause that Registration Statement to become effective as soon as possible;

                               (ii)  as expeditiously  as  possible  prepare and
file with the  Commission any  amendments  and  supplements to the  Registration
Statement and the prospectus  included in the  Registration  Statement as may be
necessary to comply with the  provisions of the  Securities  Act  (including the
anti-fraud provisions thereof) and to keep the Registration  Statement effective
for six months  from the  effective  date or such lesser  period  until all such
Registrable Shares are sold;

                               (iii) as  expeditiously  as  possible furnish to
each Selling  Stockholder  such reasonable  numbers of copies of the Prospectus,
including any preliminary Prospectus, in conformity with the requirements of the
Securities  Act,  and such  other  documents  as such  Selling  Stockholder  may
reasonably  request in order to facilitate the public sale or other  disposition
of the Registrable Shares owned by such Selling Stockholder;

                               (iv)  as expeditiously  as possible  use its best
efforts  to  register  or  qualify  the   Registrable   Shares  covered  by  the
Registration  Statement  under the securities or Blue Sky laws of such states as
the Selling Stockholders shall reasonably request, and do any and all other acts
and things that may be necessary or desirable to enable the Selling Stockholders
to  consummate  the  public  sale or other  disposition  in such  states  of the
Registrable Shares owned by the Selling Stockholder; provided, however, that the
Company shall not be required in connection  with this paragraph (iv) to qualify
as a foreign  corporation or execute a general  consent to service of process in
any jurisdiction;

                               (v)  as expeditiously as possible, cause all such
Registrable  Shares  to be  listed  on each  securities  exchange  or  automated
quotation  system on which  similar  securities  issued by the  Company are then
listed;

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CUSIP No. 296744 10 5                     13D                      Page 65 of 74

                               (vi)   promptly  provide  a  transfer  agent  and
registrar for all such  Registrable  Shares not later than the effective date of
such registration statement;

                               (vii)  promptly make  available for inspection by
the  Selling  Stockholders,   any  managing  underwriter  participating  in  any
disposition  pursuant  to  such  Registration  Statement,  and any  attorney  or
accountant or other agent  retained by any such  underwriter  or selected by the
Selling  Stockholders,  all financial  and other  records,  pertinent  corporate
documents  and  properties  of the  Company  and cause the  Company's  officers,
directors,  employees  and  independent  accountants  to supply all  information
reasonably requested by any such seller,  underwriter,  attorney,  accountant or
agent in connection with such Registration Statement;

                               (viii) as expeditiously as possible,  notify each
Selling Stockholder, promptly after it shall receive notice thereof, of the time
when such  Registration  Statement  has become  effective or a supplement to any
Prospectus forming a part of such Registration Statement has been filed; and

                               (ix)   as expeditiously as possible following the
effectiveness  of  such  Registration  Statement,  notify  each  seller  of such
Registrable  Shares  of any  request  by the  Commission  for  the  amending  or
supplementing of such Registration Statement or Prospectus.

                        (b)    If the Company has delivered a Prospectus  to the
Selling  Stockholders  and after  having  done so the  Prospectus  is amended to
comply with the  requirements  of the Securities Act, the Company shall promptly
notify the Selling  Stockholders  and, if  requested,  the Selling  Stockholders
shall  immediately  cease  making  offers of  Registrable  Shares and return all
Prospectuses  to the Company.  The Company  shall  promptly  provide the Selling
Stockholders  with revised  Prospectuses  and,  following receipt of the revised
Prospectuses,  the Selling Stockholders shall be free to resume making offers of
the Registrable Shares.

                        (c)    In the event that,  in  the  judgment   of    the
Company,  it  is  advisable  to  suspend  use  of  a  Prospectus  included  in a
Registration Statement due to pending material developments or other events that
have not yet been publicly disclosed and as to which the Company believes public
disclosure  would be  detrimental  to the Company,  the Company shall notify all
Selling Stockholders to such effect, and, upon receipt of such notice, each such
Selling  Stockholder  shall  immediately  discontinue  any sales of  Registrable
Shares pursuant to such  Registration  Statement until such Selling  Stockholder
has  received  copies of a  supplemented  or  amended  Prospectus  or until such
Selling  Stockholder  is advised in writing by the Company that the then current
Prospectus may be used and has received copies of any additional or supplemental
filings  that are  incorporated  or deemed  incorporated  by  reference  in such
Prospectus.

                  2.4   Allocation  of  Expenses.   The  Company  will  pay  all
Registration  Expenses for all  registrations  under this  Agreement;  provided,
however, that if a registration under Section 2.1 is withdrawn at the request of
the Initiating  Holders  (other than as a result of  information  concerning the
business  or  financial  condition  of the  Company  which is made  known to the
Stockholders after the date on which such registration was requested) and if the

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Initiating Holders elect not to have such registration counted as a registration
requested  under  Section  2.1,  the  requesting   Stockholders  shall  pay  the
Registration  Expenses  of such  registration  pro rata in  accordance  with the
number of their Registrable Shares included in such  registration.  For purposes
of this  Section,  the term  "Registration  Expenses"  shall  mean all  expenses
incurred by the Company in complying  with this  Agreement,  including,  without
limitation,  all registration and filing fees,  exchange listing fees,  printing
expenses, fees and expenses of counsel for the Company and the fees and expenses
of one counsel  selected by the Selling  Stockholders  to represent  the Selling
Stockholders,  state Blue Sky fees and expenses,  and the expense of any special
audits  incident  to  or  required  by  any  such  registration,  but  excluding
underwriting discounts, selling commissions and the fees and expenses of Selling
Stockholders'  own counsel  (other than the counsel  selected to  represent  all
Selling Stockholders).

                  2.5      Indemnification and Contribution.

                           (a) In the  event of any  registration  of any of the
Registrable  Shares under the  Securities  Act pursuant to this  Agreement,  the
Company  will  indemnify  and  hold  harmless  each  Selling  Stockholder,  each
underwriter  of such  Registrable  Shares,  and each other  person,  if any, who
controls  such  Selling  Stockholder  or  underwriter  within the meaning of the
Securities  Act or the  Exchange  Act  against any  losses,  claims,  damages or
liabilities, joint or several, to which such Selling Stockholder, underwriter or
controlling  person may become  subject under the  Securities  Act, the Exchange
Act,  state  securities or Blue Sky laws or  otherwise,  insofar as such losses,
claims,  damages or liabilities (or actions in respect  thereof) arise out of or
are based upon any untrue  statement or alleged untrue statement of any material
fact contained in any Registration Statement under which such Registrable Shares
were registered  under the Securities  Act, any preliminary  prospectus or final
prospectus  contained  in  the  Registration  Statement,  or  any  amendment  or
supplement to such Registration Statement, or arise out of or are based upon the
omission  or alleged  omission  to state a material  fact  required to be stated
therein or  necessary to make the  statements  therein not  misleading;  and the
Company will  reimburse  such  Selling  Stockholder,  underwriter  and each such
controlling  person for any legal or any other expenses  reasonably  incurred by
such Selling  Stockholder,  underwriter or controlling person in connection with
investigating or defending any such loss,  claim,  damage,  liability or action;
provided,  however,  that the Company will not be liable in any such case to the
extent that any such loss, claim,  damage or liability arises out of or is based
upon any untrue  statement  or  omission  made in such  Registration  Statement,
preliminary  prospectus or prospectus,  or any such amendment or supplement,  in
reliance upon and in conformity with  information  furnished to the Company,  in
writing, by or on behalf of such Selling Stockholder, underwriter or controlling
person specifically for use in the preparation thereof.

                           (b) In the  event of any  registration  of any of the
Registrable  Shares under the  Securities Act pursuant to this  Agreement,  each
Selling Stockholder, severally and not jointly, will indemnify and hold harmless
the Company,  each of its directors and officers and each  underwriter  (if any)
and each person, if any, who controls the Company or any such underwriter within
the  meaning of the  Securities  Act or the  Exchange  Act,  against any losses,
claims,  damages or liabilities,  joint or several,  to which the Company,  such
directors and officers,  underwriter  or  controlling  person may become subject
under the Securities  Act,  Exchange Act,  state  securities or Blue Sky laws or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect  thereof) arise out of or are based upon any untrue

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CUSIP No. 296744 10 5                     13D                      Page 67 of 74

statement  or alleged  untrue  statement  of a material  fact  contained  in any
Registration Statement under which such Registrable Shares were registered under
the Securities Act, any preliminary  prospectus or final prospectus contained in
the Registration  Statement,  or any amendment or supplement to the Registration
Statement, or arise out of or are based upon any omission or alleged omission to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein not  misleading,  if the  statement  or omission was made in
reliance  upon and in  conformity  with  information  relating  to such  Selling
Stockholder  furnished in writing to the Company by or on behalf of such Selling
Stockholder  specifically  for use in connection  with the  preparation  of such
Registration Statement,  prospectus, amendment or supplement; provided, however,
that the obligations of a Selling  Stockholder  hereunder shall be limited to an
amount  equal to the net  proceeds to such Selling  Stockholder  of  Registrable
Shares sold in connection with such registration.

                           (c) Each party entitled to indemnification under this
Section (the  "Indemnified  Party")  shall give notice to the party  required to
provide   indemnification   (the  "Indemnifying   Party")  promptly  after  such
Indemnified Party has actual knowledge of any claim as to which indemnity may be
sought,  and shall  permit the  Indemnifying  Party to assume the defense of any
such claim or any litigation resulting therefrom; provided, that counsel for the
Indemnifying  Party,  who shall conduct the defense of such claim or litigation,
shall  be  approved  by the  Indemnified  Party  (whose  approval  shall  not be
unreasonably  withheld);  and,  provided,  further,  that  the  failure  of  any
Indemnified  Party to give  notice as  provided  herein  shall not  relieve  the
Indemnifying  Party of its  obligations  under this Section except to the extent
that  the  Indemnifying  Party  is  adversely  affected  by  such  failure.  The
Indemnified  Party may  participate  in such  defense at such  party's  expense;
provided,  however,  that the  Indemnifying  Party  shall  pay such  expense  if
representation  of  such  Indemnified  Party  by  the  counsel  retained  by the
Indemnifying  Party would be inappropriate due to actual or potential  differing
interests  between the Indemnified Party and any other party represented by such
counsel  in such  proceeding;  provided  further  that  in no  event  shall  the
Indemnifying Party be required to pay the expenses of more than one law firm per
jurisdiction as counsel for the Indemnified  Party. The Indemnifying  Party also
shall be responsible for the expenses of such defense if the Indemnifying  Party
does not elect to assume such defense.  No Indemnifying Party, in the defense of
any such claim or litigation shall,  except with the consent of each Indemnified
Party,  consent to entry of any judgment or enter into any settlement which does
not  include as an  unconditional  term  thereof  the giving by the  claimant or
plaintiff to such  Indemnified  Party of a release from all liability in respect
of such claim or litigation,  and no Indemnified Party shall consent to entry of
any  judgment  or settle  such claim or  litigation  without  the prior  written
consent of the  Indemnifying  Party,  which  consent  shall not be  unreasonably
withheld.

                           (d) In  order  to  provide  for  just  and  equitable
contribution in circumstances in which the indemnification  provided for in this
Section 2.5 is due in accordance with its terms but for any reason is held to be
unavailable to an Indemnified  Party in respect to any losses,  claims,  damages
and liabilities  referred to herein,  then the Indemnifying Party shall, in lieu
of indemnifying such Indemnified Party, contribute to the amount paid or payable
by such  Indemnified  Party as a  result  of such  losses,  claims,  damages  or
liabilities  to  which  such  party  may be  subject  in such  proportion  as is
appropriate to reflect the relative fault of the Company on the one hand and the
Selling Stockholders on the other in connection with the statements or omissions
which resulted in such losses,  claims,  damages or liabilities,  as well as any
other

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CUSIP No. 296744 10 5                     13D                      Page 68 of 74

relevant  equitable  considerations.  The relative  fault of the Company and the
Selling  Stockholders  shall be  determined by reference to, among other things,
whether  the untrue or alleged  untrue  statement  of material  fact  related to
information supplied by the Company or the Selling Stockholders and the parties'
relative intent, knowledge,  access to information and opportunity to correct or
prevent such  statement or  omission.  The Company and the Selling  Stockholders
agree that it would not be just and equitable if  contribution  pursuant to this
Section 2.5 were  determined  by pro rata  allocation  or by any other method of
allocation which does not take account of the equitable  considerations referred
to above.  Notwithstanding  the provisions of this paragraph of Section 2.5, (a)
in no case shall any one Selling  Stockholder be liable or  responsible  for any
amount in excess of the net proceeds  received by such Selling  Stockholder from
the  offering  of  Registrable  Shares and (b) the  Company  shall be liable and
responsible for any amount in excess of such proceeds;  provided,  however, that
no person guilty of fraudulent  misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to  contribution  from any person
who was not guilty of such fraudulent  misrepresentation.  Any party entitled to
contribution  will,  promptly  after  receipt of notice of  commencement  of any
action,  suit or  proceeding  against such party in respect of which a claim for
contribution  may be made against  another  party or parties under this Section,
notify  such  party or parties  from whom  contribution  may be sought,  but the
omission so to notify such party or parties from whom contribution may be sought
shall not  relieve  such  party  from any other  obligation  it or they may have
thereunder  or  otherwise  under  this  Section.  No party  shall be liable  for
contribution  with  respect to any action,  suit,  proceeding  or claim  settled
without its prior  written  consent,  which  consent  shall not be  unreasonably
withheld.

                  2.6 Other Matters with Respect to Underwritten  Offerings.  In
the event that Registrable Shares are sold pursuant to a Registration  Statement
in an underwritten  offering  pursuant to Section 2.1, the Company agrees to (a)
enter into an underwriting  agreement containing  customary  representations and
warranties  with  respect to the  business  and  operations  of the  Company and
customary  covenants and  agreements  to be performed by the Company,  including
without limitation  customary  provisions with respect to indemnification by the
Company of the underwriters of such offering;  (b) use its best efforts to cause
its legal counsel to render customary  opinions to the underwriters with respect
to the  Registration  Statement;  and (c) use its  best  efforts  to  cause  its
independent  public accounting firm to issue customary "cold comfort letters" to
the underwriters with respect to the Registration Statement.

                  2.7 Information by Holder.  Each holder of Registrable  Shares
included  in any  registration  shall  furnish to the Company  such  information
regarding  such  holder  and the  distribution  proposed  by such  holder as the
Company may reasonably request in writing and as shall be required in connection
with  any  registration,   qualification  or  compliance  referred  to  in  this
Agreement.

                  2.8 "Stand-Off"  Agreement;  Confidentiality of Notices.  Each
Stockholder,  if  requested by the Company and the  managing  underwriter  of an
underwritten  public offering by the Company of Common Stock,  shall not sell or
otherwise  transfer or dispose of any Registrable  Shares or other securities of
the  Company  held by such  Stockholder  for a period of 90 days  following  the
effective date of a Registration  Statement;  provided, that all stockholders of
the Company  then  holding at least 5% of the  outstanding  Common  Stock (on an
as-converted  basis) and all  officers and  directors of the Company  enter into
similar agreements.

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CUSIP No. 296744 10 5                     13D                      Page 69 of 74

                  The Company may impose stop-transfer instructions with respect
to  the  Registrable  Shares  or  other  securities  subject  to  the  foregoing
restriction until the end of such 90-day period.

                  Any Stockholder  receiving any written notice from the Company
regarding the Company's plans to file a Registration  Statement shall treat such
notice  confidentially  and shall not disclose  such  information  to any person
other than as necessary to exercise its rights under this Agreement.

                  2.9 Limitations on Subsequent Registration Rights. The Company
shall not,  without the prior written consent of  Stockholders  holding at least
51% of the  Registrable  Shares  then held by all  Stockholders,  enter into any
agreement  (other than this Agreement) with any holder or prospective  holder of
any  securities  of the Company  which grant such holder or  prospective  holder
rights to  include  securities  of the  Company in any  Registration  Statement,
unless (a) such rights to include securities in a registration  initiated by the
Company or by  Stockholders  are not more  favorable  than the rights granted to
Other Holders under Section 2.2 of this Agreement, and (b) no rights are granted
to initiate a registration,  other than registration  pursuant to a registration
statement on Form S-3 (or its successor) in which  Stockholders  are entitled to
include  Registrable  Shares on a pro rata basis with such holders  based on the
number  of  shares  of  Common  Stock  (on  an  as-converted   basis)  owned  by
Stockholders and such holders.

                  2.10  Rule 144  Requirements.  After the  earliest  of (i) the
closing of the sale of  securities  of the Company  pursuant  to a  Registration
Statement,  (ii) the  registration by the Company of a class of securities under
Section 12 of the  Exchange  Act,  or (iii) the  issuance  by the  Company of an
offering circular pursuant to Regulation A under the Securities Act, the Company
agrees to:

                        (a) make and keep current public  information  about the
Company available, as those terms are understood and defined in Rule 144;

                        (b) use its best efforts to file with the  Commission in
a timely  manner all reports and other  documents  required of the Company under
the Securities Act and the Exchange Act (at any time after it has become subject
to such reporting requirements); and

                        (c)  furnish to any holder of  Registrable  Shares  upon
request (i) a written  statement  by the Company as to its  compliance  with the
reporting  requirements  of Rule 144 and of the  Securities Act and the Exchange
Act (at any time after it has become  subject to such  reporting  requirements),
(ii) a copy of the most recent  annual or quarterly  report of the Company,  and
(iii)  such other  reports  and  documents  of the  Company  as such  holder may
reasonably  request to avail  itself of any similar  rule or  regulation  of the
Commission allowing it to sell any such securities without registration.

                  2.11  Termination.  All  of  the  Company's  obligations    to
register  Registrable  Shares under Sections 2.1 and 2.2 of this Agreement shall
terminate five years after the date of this Agreement.

                  3.0   Transfers of Rights. This Agreement, and the rights  and
obligations  of each Purchaser  hereunder,  may be assigned by such Purchaser to
any  partner,  member,  stockholder  or

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CUSIP No. 296744 10 5                     13D                      Page 70 of 74

affiliate of such Purchaser,  and such transferee  shall be deemed a "Purchaser"
for purposes of this Agreement;  provided that the transferee  provides  written
notice of such  assignment  to the  Company  and  agrees in  writing to be bound
hereby.

                   4.0  General.

                        (a) Severability.  The invalidity or unenforceability of
any provision of this Agreement shall not affect the validity or  enforceability
of any other provision of this Agreement.

                        (b)  Specific  Performance.   In addition to any and all
other  remedies  that may be available at law in the event of any breach of this
Agreement,  each  Purchaser  shall be entitled to  specific  performance  of the
agreements and obligations of the Company hereunder and to such other injunctive
or  other  equitable   relief  as  may  be  granted  by  a  court  of  competent
jurisdiction.

                        (c) Governing  Law. This  Agreement shall be governed by
and  construed in  accordance  with the  internal  laws of the  Commonwealth  of
Virginia (without reference to the conflicts of law provisions thereof).

                        (d)  Notices.   All  notices,  requests,  consents,  and
other  communications  under this  Agreement  shall be in  writing  and shall be
deemed  delivered  (i) two  business  days  after  being sent by  registered  or
certified mail, return receipt  requested,  postage prepaid or (ii) one business
day after  being  sent via a  reputable  nationwide  overnight  courier  service
guaranteeing next business day delivery,  in each case to the intended recipient
as set forth below:

                        If to the Company,  at 9150 Guilford Road,  Columbia, MD
21046,  Attention:  President, or at such other address or addresses as may have
been  furnished  in writing by the  Company  to the  Purchasers,  with a copy to
Whiteford,  Taylor & Preston, L.L.P., 7 Saint Paul Street,  Baltimore,  Maryland
21202-1626, Attention: D. Scott Freed; or

                        If to a Purchaser,  at his or its address set  forth  on
Exhibit A, or at such other  address or addresses as may have been  furnished to
the  Company  in writing  by such  Purchaser,  with a copy to Hale and Dorr LLP,
11951 Freedom Drive, Reston, VA 20190, Attention: William F. Winslow.

                        Any  party may give any  notice,  request,   consent  or
other  communication  under this  Agreement  using any other  means  (including,
without limitation,  personal delivery, messenger service, telecopy, first class
mail or  electronic  mail),  but no  such  notice,  request,  consent  or  other
communication  shall be deemed to have been duly  given  unless  and until it is
actually received by the party for whom it is intended. Any party may change the
address to which notices,  requests,  consents or other communications hereunder
are to be delivered by giving the other  parties  notice in the manner set forth
in this Section.

                        (e) Complete Agreement.   This Agreement constitutes the
entire  agreement and  understanding  of the parties  hereto with respect to the
subject  matter hereof and supersedes  all prior  agreements and  understandings
relating to such subject matter.

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CUSIP No. 296744 10 5                     13D                      Page 71 of 74

                        (f) Amendments and Waivers.   Any term of this Agreement
may be amended or terminated  and the  observance of any term of this  Agreement
may be waived with respect to all parties to this Agreement (either generally or
in a particular  instance and either  retroactively or prospectively),  with the
written  consent  of  the  Company  and  the  holders  of at  least  51%  of the
Registrable  Shares  held  by  all  of  the  Stockholders.  Notwithstanding  the
foregoing, this Agreement may be amended or terminated,  and any right hereunder
may be waived with respect to all parties to this  Agreement with the consent of
the holders of less than all  Registrable  Shares only in a manner which applies
to all such holders in the same  fashion.  Any such  amendment,  termination  or
waiver  effected in  accordance  with this  Section 4(f) shall be binding on all
parties  hereto,  even if they do not execute such  consent and the Company.  No
waivers of or exceptions to any term,  condition or provision of this Agreement,
in any one or more instances,  shall be deemed to be, or construed as, a further
or continuing waiver of any such term, condition or provision.

                        (g) Pronouns.   Whenever  the context may require,   any
pronouns  used in this  Agreement  shall  include the  corresponding  masculine,
feminine or neuter  forms,  and the singular  form of nouns and  pronouns  shall
include the plural, and vice versa.

                        (h) Counterparts; Facsimile Signatures.   This Agreement
may be executed in any number of counterparts,  each of which shall be deemed to
be an original,  and all of which  together  shall  constitute  one and the same
document. This Agreement may be executed by facsimile signatures.

                        (i)  Section  Headings.  The  section  headings are  for
the  convenience  of the parties and in no way alter,  modify,  amend,  limit or
restrict the contractual obligations of the parties.

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CUSIP No. 296744 10 5                     13D                      Page 72 of 74

Executed as of the date first written above.

                                             COMPANY:
                                             ESSEX CORPORATION
                                             By:________________________________
                                             Name:______________________________
                                             Title:_____________________________

                                             PURCHASERS:
                                             GEF OPTICAL INVESTMENT COMPANY, LLC


                                             By:________________________________
                                                Name:
                                                Title:

                                             NETWORKING VENTURES, LLC

                                             By:________________________________
                                                Name:
                                                Title:

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CUSIP No. 296744 10 5                     13D                      Page 73 of 74

                                                                       Exhibit A

                                   Purchasers

Name and Address

GEF Optical Investment Company, LLC
1225 Eye Street, N.W., Suite 900
Washington, DC 20005

Networking Ventures, L.L.C.
8970 Route 108
Suite B
Columbia, MD 21045

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CUSIP No. 296744 10 5                     13D                      Page 74 of 74

                                    EXHIBIT 6

                           JOINT ACQUISITION STATEMENT

                                                       PURSUANT TO RULE 13D-1(k)


         The undersigned  acknowledge and agree that the foregoing  statement on
Schedule  13D,  is  filed  on  behalf  of each of the  undersigned  and that all
subsequent  amendments  to this  statement  on Schedule  13D,  shall be filed on
behalf of each of the  undersigned  without the  necessity of filing  additional
joint  acquisition  statements.  The undersigned  acknowledge that each shall be
responsible for the timely filing of such  amendments,  and for the completeness
and accuracy of the information  concerning him/her or it contained therein, but
shall not be responsible  for the  completeness  and accuracy of the information
concerning the others, except to the extent that he or it knows or has reason to
believe that such information is inaccurate.

DATED:  September 15, 2000

GEF OPTICAL INVESTMENT COMPANY, LLC                     NETWORKING VENTURES, LLC

By:   /s/  H. Jeffrey Leonard                           By:  /s/ John G. Hannon
   -----------------------------                        ------------------------
     H. Jeffrey Leonard, President                       John G. Hannon, Partner

H. JEFFREY LEONARD                                      MARIE S. MINTON

   /s/  H. Jeffrey Leonard                              /s/  Marie S. Minton
-----------------------------                           ------------------------


JAMES P. GREGORY                                        JOHN G. HANNON

   /s/  James P. Gregory                                /s/  John G. Hannon
---------------------------                             ------------------------


CAROLINE S. PISANO

   /s/Caroline S. Pisano
---------------------------


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