ESSEX CORPORATION
SC 13D/A, EX-8, 2001-01-10
ENGINEERING SERVICES
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CUSIP No. 296744 10 5                13D/A                         Page 32 of 42

                                                                       EXHIBIT 8

                                ESSEX CORPORATION

                          REGISTRATION RIGHTS AGREEMENT

         This  Agreement  dated as of December  14, 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
piggyback  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.

                  "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.

                  "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


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CUSIP No. 296744 10 5                13D/A                         Page 33 of 42

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 2.3.

                  "Registrable Shares" means (i) the shares of Common Stock sold
to Purchaser  under the Purchase  Agreement  and (ii) 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.

                  "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.

                   "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      Incidental Registration.

                  (a)      Whenever the Company  proposes to file a Registration
Statement 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
2.1(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 2.1 without obligation to any Stockholder.

                  (b)      If the  registration  for  which  the  Company  gives
notice pursuant to Section 2.1(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 2.1(a). In such event, the right of any
Stockholder to include its Registrable  Shares in such registration  pursuant to
Section 2.1 shall be conditioned upon such  Stockholder's  participation in such
underwriting on the terms


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CUSIP No. 296744 10 5                13D/A                         Page 34 of 42

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  2.4.  Notwithstanding  any other  provision of this Section
2.1, 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 Company gives the notice
specified in Section  2.1(a).  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.

         2.2      Registration Procedures.

                  (a)      If and whenever the Company effects the  registration
of any Registrable Shares under the Securities Act, the Company shall:

                           (i)      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;

                           (ii)     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  (ii) to  qualify  as a  foreign
corporation  or  execute  a  general  consent  to  service  of  process  in  any
jurisdiction;


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CUSIP No. 296744 10 5                13D/A                         Page 35 of 42

                           (iii)    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;

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

                           (v)      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;

                           (vi)     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

                           (vii)    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.

         2.3      Allocation of Expenses.  The Company will pay all Registration
Expenses  for all  registrations  under this  Agreement.  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


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CUSIP No. 296744 10 5                13D/A                         Page 36 of 42

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).

         2.4      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 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


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CUSIP No. 296744 10 5                13D/A                         Page 37 of 42

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 2.4 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 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


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CUSIP No. 296744 10 5                13D/A                         Page 38 of 42

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 2.4 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 2.4, (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.

         2.5      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.

         2.6      "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.

         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.

         2.7      Rule 144 Requirements. 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;


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CUSIP No. 296744 10 5                13D/A                         Page 39 of 42

                  (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, (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.

         2.8      Termination.  All of the  Company's  obligations  to  register
Registrable  Shares under Section 2.1 of this Agreement  shall  terminate  three
years after the date of this Agreement.

3.       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 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.       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 D. Scott
Freed,  Esquire,  Whiteford,  Taylor & Preston  L.L.P.,  Seven St. Paul  Street,
Baltimore, Maryland 21202; or


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CUSIP No. 296744 10 5                13D/A                         Page 40 of 42

         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.

         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.

                  (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.



<PAGE>

CUSIP No. 296744 10 5                13D/A                         Page 41 of 42

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, L.L.C.


                                         By:
                                            ------------------------------
                                            Name:
                                            Title:



<PAGE>

CUSIP No. 296744 10 5                13D/A                         Page 42 of 42

                                                                       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.
9150 Guilford Road
Columbia, MD 21045



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