
<PAGE>

                                                                    Exhibit 10.5

                        PLEDGE AGREEMENT dated as of June 23, 1999, among ANTEON
                  CORPORATION, a Virginia corporation (the "BORROWER"), AZIMUTH
                  TECHNOLOGIES, INC., a Delaware corporation ("AZIMUTH"), each
                  Subsidiary of the Borrower listed on Schedule I hereto (each
                  such Subsidiary individually a "SUBSIDIARY PLEDGOR" and
                  collectively, the "SUBSIDIARY PLEDGORS"; the Borrower, Azimuth
                  and the Subsidiary Pledgors are referred to collectively
                  herein as the "PLEDGORS") and MELLON BANK, N.A., a national
                  banking association ("MELLON"), as collateral agent (in such
                  capacity, the "COLLATERAL AGENT") for the Secured Parties (as
                  defined in the Credit Agreement referred to below).

      Reference is made to (a) the Credit Agreement dated as of June 23, 1999
(as amended, supplemented or otherwise modified from time to time, the "CREDIT
AGREEMENT"), among the Borrower, the lenders from time to time party thereto
(the "LENDERS"), Credit Suisse First Boston, as administrative agent for the
Lenders (in such capacity, the "ADMINISTRATIVE AGENT"), and as issuing bank,
Mellon, as Collateral Agent, swingline lender and syndication agent, and
Deutsche Bank A.G., as documentation agent, and (b) the Subsidiary Guarantee
Agreement dated as of June 23, 1999 (as amended, supplemented or otherwise
modified from time to time, the "GUARANTEE AGREEMENT") among the Subsidiary
Pledgors and the Collateral Agent. Capitalized terms used herein and not defined
herein shall have the meanings assigned to such terms in the Credit Agreement.

      The Lenders have agreed to make Loans to the Borrower and the Issuing Bank
has agreed to issue Letters of Credit for the account of the Borrower, in each
case pursuant to, and upon the terms and subject to the conditions specified in,
the Credit Agreement. The Subsidiary Guarantors have agreed to guarantee, among
other things, all the obligations of the Borrower under the Credit Agreement.
The obligations of the Lenders to make Loans and of the Issuing Bank to issue
Letters of Credit are conditioned upon, among other things, the execution and
delivery by the Pledgors of a Pledge Agreement in the form hereof to secure (a)
the due and punctual payment by the Borrower of (i) the principal of and
premium, if any, and interest (including interest accruing during the pendency
of any bankruptcy, insolvency, receivership or other similar proceeding,
regardless of whether allowed or allowable in such proceeding) on the Loans,
when and as due, whether at maturity, by acceleration, upon one or more dates
set for prepayment or otherwise, (ii) each payment required to be made by the
Borrower under the Credit Agreement in respect of any Letter of Credit, when and
as due, including payments in respect of reimbursement of disbursements,
interest thereon and obligations to provide cash collateral, and (iii) all other
monetary obligations, including fees, costs, expenses and indemnities, whether
primary, secondary, direct, contingent, fixed or otherwise (including monetary
obligations incurred during the pendency of any bankruptcy, insolvency,
receivership or other similar proceeding, regardless of whether allowed or
allowable in such proceeding), of the Borrower to the Secured Parties under this
Agreement, the Credit Agreement and the other Loan Documents, (b) the due and
punctual performance of all covenants, agreements, obligations and liabilities
of the Borrower under or pursuant to this Agreement, the Credit Agreement and
the other Loan Documents, (c) the due and punctual payment and performance of
all the covenants, agreements, obligations and liabilities of each Loan Party
under or pursuant to this Agreement and the other Loan Documents, (d) unless
otherwise agreed upon in writing by the applicable Lender party thereto, the due
and punctual payment and performance of all obligations of the Borrower,
monetary or otherwise, under each Hedging Agreement entered into with (i)
Mellon, pursuant to a Master Agreement for Swaps dated May 6, 1998, between
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                                                                               2


the Borrower and Mellon and (ii) any counterparty that was a Lender (or an
Affiliate of a Lender) at the time such Hedging Agreement was entered into and
(e) the due and punctual payment and performance of all obligations of any Loan
Party in respect of (i) overdrafts and related liabilities incurred in the
ordinary course of business owed to Mellon or any of its Affiliates and arising
from treasury, depository and cash management services or in connection with any
automated clearing house transfers of funds and (ii) indebtedness to Mellon in
connection with purchase cards issued by Mellon in an aggregate amount not to
exceed $500,000 (all the monetary and other obligations referred to in the
preceding lettered clauses of this paragraph being referred to collectively as
the "OBLIGATIONS").

      Accordingly, the Pledgors and the Collateral Agent, on behalf of itself
and each Secured Party (and each of their respective successors or assigns),
hereby agree as follows:

      SECTION 1. PLEDGE. As security for the payment and performance, as the
case may be, in full of the Obligations, each Pledgor hereby transfers, grants,
bargains, sells, conveys, hypothecates, pledges, sets over and delivers unto the
Collateral Agent, its successors and assigns, and hereby grants to the
Collateral Agent, its successors and assigns, for the ratable benefit of the
Secured Parties, a security interest in all of the Pledgor's right, title and
interest in, to and under (a) Equity Interests owned by it and listed on
Schedule II hereto and any Equity Interests of the Borrower or any Subsidiary
(other than any Inactive Subsidiary) obtained in the future by the Pledgor and
the certificates representing all such Equity Interests (the "PLEDGED STOCK");
PROVIDED that the Pledged Stock shall not include (i) more than 65% of the
issued and outstanding shares of voting capital stock and 100% of the issued and
outstanding shares of nonvoting capital stock (if any) of any Foreign
Subsidiary, (ii) to the extent that applicable law requires that a Subsidiary of
the Pledgor issue directors' qualifying shares, such qualifying shares or (iii)
the shares of capital stock of any Foreign Subsidiary with total assets of less
than $500,000; (b)(i) the debt securities listed opposite the name of the
Pledgor on Schedule II hereto, (ii) any debt securities in the future issued to
any Pledgor (other than Azimuth) and (iii) the promissory notes and any other
instruments evidencing such debt securities (the "PLEDGED DEBT SECURITIES"); (c)
all other property that may be delivered to and held by the Collateral Agent
pursuant to the terms hereof; (d) subject to Section 5, all payments of
principal or interest, dividends, cash, instruments and other property from time
to time received, receivable or otherwise distributed, in respect of, in
exchange for or upon the conversion of the securities referred to in clauses (a)
and (b) above; (e) subject to Section 5, all rights and privileges of the
Pledgor with respect to the securities and other property referred to in clauses
(a), (b), (c) and (d) above; and (f) all proceeds of any of the foregoing (the
items referred to in clauses (a) through (f) above being collectively referred
to as the "COLLATERAL"). Upon delivery to the Collateral Agent, (a) any stock
certificates, notes or other securities now or hereafter included in the
Collateral (the "PLEDGED SECURITIES") shall be accompanied by stock powers duly
executed in blank or other instruments of transfer satisfactory to the
Collateral Agent and by such other instruments and documents as the Collateral
Agent may reasonably request and (b) all other property comprising part of the
Collateral shall be accompanied by proper instruments of assignment duly
executed by the applicable Pledgor and such other instruments or documents as
the Collateral Agent may reasonably request. Each delivery of Pledged Securities
shall be accompanied by a schedule describing the securities theretofore and
then being pledged hereunder, which schedule shall be attached hereto as
Schedule II and made a part hereof. Each schedule so delivered shall supersede
any prior schedules so delivered.

      TO HAVE AND TO HOLD the Collateral, together with all right, title,
interest, powers, privileges and preferences pertaining or incidental thereto,
unto the Collateral Agent,
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                                                                               3


its successors and assigns, for the ratable benefit of the Secured Parties,
forever; SUBJECT, HOWEVER, to the terms, covenants and conditions hereinafter
set forth.

      SECTION 2. DELIVERY OF THE COLLATERAL. (a) Each Pledgor agrees promptly to
deliver or cause to be delivered to the Collateral Agent any and all Pledged
Securities, and any and all certificates or other instruments or documents
representing the Collateral.

      (b) Each Pledgor (other than Azimuth) will cause any Indebtedness for
borrowed money owed to the Pledgor by any person in excess of $200,000 to be
evidenced by a duly executed promissory note that is pledged and delivered to
the Collateral Agent pursuant to the terms thereof.

      SECTION 3. REPRESENTATIONS, WARRANTIES AND COVENANTS. Each Pledgor hereby
represents, warrants and covenants, as to itself and the Collateral pledged by
it hereunder, to and with the Collateral Agent that:

            (a) the Pledged Stock represents that percentage as set forth on
      Schedule II of the issued and outstanding shares of each class of the
      capital stock of the issuer with respect thereto;

            (b) except for the security interest granted hereunder, the Pledgor
      (i) is and will at all times continue to be the direct owner, beneficially
      and of record, of the Pledged Securities indicated on Schedule II, (ii)
      holds the same free and clear of all Liens, (iii) will make no assignment,
      pledge, hypothecation or transfer of, or create or permit to exist any
      security interest in or other Lien on, the Collateral, other than pursuant
      hereto, and (iv) subject to Section 5, will cause any and all Collateral,
      whether for value paid by the Pledgor or otherwise, to be forthwith
      deposited with the Collateral Agent and pledged or assigned hereunder;

            (c) the Pledgor (i) has the power and authority to pledge the
      Collateral in the manner hereby done or contemplated and (ii) will defend
      its title or interest thereto or therein against any and all Liens (other
      than the Lien created by this Agreement), however arising, of all persons
      whomsoever;

            (d) no consent of any other person (including stockholders or
      creditors of any Pledgor) and no consent or approval of any Governmental
      Authority or any securities exchange was or is necessary to the validity
      of the pledge effected hereby;

            (e) by virtue of the execution and delivery by the Pledgors of this
      Agreement, when the Pledged Securities, certificates or other documents
      representing or evidencing the Collateral are delivered to the Collateral
      Agent in accordance with this Agreement, the Collateral Agent will obtain
      a valid and perfected first lien upon and security interest in such
      Pledged Securities as security for the payment and performance of the
      Obligations;

            (f) the pledge effected hereby is effective to vest in the
      Collateral Agent, on behalf of the Secured Parties, the rights of the
      Collateral Agent in the Collateral as set forth herein;

            (g) all of the Pledged Stock has been duly authorized and validly
      issued and is fully paid and nonassessable;
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                                                                               4


            (h) all information set forth herein relating to the Pledged Stock
      is accurate and complete in all material respects as of the date hereof;
      and

            (i) the pledge of the Pledged Stock pursuant to this Agreement does
      not violate Regulation T, U or X of the Federal Reserve Board or any
      successor thereto as of the date hereof.

      SECTION 4. COVENANTS OF AZIMUTH. Azimuth covenants that it will not:

            (a) engage in any business activities or have any assets or
      liabilities, other than (i) its ownership of the Equity Interests of the
      Borrower and liabilities incidental thereto, including its liabilities
      pursuant to this Agreement, (ii) its obligations pursuant to (A) the
      Seller Purchase Money Note, (B) the Investor Notes, (C) the Holdings
      Convertible Notes and (D) additional indebtedness to any Permitted
      Investor and (iii) its employment of members of its management.

            (b) make (or give any notice in respect thereof) any voluntary or
      optional payment or prepayment on or redemption or acquisition for value
      of, or any prepayment or redemption as a result of any asset sale, change
      of control or similar event of, any Senior Subordinated Notes, the Seller
      Purchase Money Note or the Investor Notes.

      SECTION 5. REGISTRATION IN NOMINEE NAME; DENOMINATIONS. The Collateral
Agent, on behalf of the Secured Parties, shall have the right (in its sole and
absolute discretion) upon the occurrence and during the continuance of a Default
or an Event of Default, to hold the Pledged Securities in its own name as
pledgee, the name of its nominee (as pledgee or as sub-agent) or the name of the
Pledgors, endorsed or assigned in blank or in favor of the Collateral Agent. If
a Default or an Event of Default shall have occurred and be continuing, each
Pledgor will promptly give to the Collateral Agent copies of any notices or
other communications received by it with respect to Pledged Securities
registered in the name of such Pledgor. The Collateral Agent shall at all times
have the right to exchange the certificates representing Pledged Securities for
certificates of smaller or larger denominations for any purpose consistent with
this Agreement.

      SECTION 6. VOTING RIGHTS; DIVIDENDS AND INTEREST, ETC. (a) Unless and
until an Event of Default shall have occurred and be continuing and the
Collateral Agent shall have given the Pledgors notice of its intent to exercise
its rights under this Agreement:

            (i) Each Pledgor shall be entitled to exercise any and all voting
      and/or other consensual rights and powers inuring to an owner of Pledged
      Securities or any part thereof for any purpose consistent with the terms
      of this Agreement, the Credit Agreement and the other Loan Documents;
      PROVIDED, HOWEVER, that such Pledgor will not be entitled to exercise any
      such right if the result thereof could materially and adversely affect the
      rights inuring to a holder of the Pledged Securities or the rights and
      remedies of any of the Secured Parties under this Agreement or the Credit
      Agreement or any other Loan Document or the ability of the Secured Parties
      to exercise the same.

            (ii) The Collateral Agent shall execute and deliver to each Pledgor,
      or cause to be executed and delivered to each Pledgor, all such proxies,
      powers of attorney and other instruments as such Pledgor may reasonably
      request for the purpose of enabling
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                                                                               5


      such Pledgor to exercise the voting and/or consensual rights and powers it
      is entitled to exercise pursuant to subparagraph (i) above and to receive
      the dividends it is entitled to receive pursuant to subparagraph (iii)
      below.

            (iii) Each Pledgor shall be entitled to receive and retain any and
      all cash dividends, interest and principal paid on the Pledged Securities
      to the extent and only to the extent that such cash dividends, interest
      and principal are permitted by, and otherwise paid in accordance with, the
      terms and conditions of the Credit Agreement, the other Loan Documents and
      applicable laws. All noncash dividends, interest and principal, and all
      dividends, interest and principal paid or payable in cash or otherwise in
      connection with a partial or total liquidation or dissolution, return of
      capital, capital surplus or paid-in surplus, and all other distributions
      (other than distributions referred to in the preceding sentence) made on
      or in respect of the Pledged Securities, whether paid or payable in cash
      or otherwise, whether resulting from a subdivision, combination or
      reclassification of the outstanding capital stock of the issuer of any
      Pledged Securities or received in exchange for Pledged Securities or any
      part thereof, or in redemption thereof, or as a result of any merger,
      consolidation, acquisition or other exchange of assets to which such
      issuer may be a party or otherwise, shall be and become part of the
      Collateral, and, if received by any Pledgor, shall not be commingled by
      such Pledgor with any of its other funds or property but shall be held
      separate and apart therefrom, shall be held in trust for the benefit of
      the Collateral Agent and shall be forthwith delivered to the Collateral
      Agent in the same form as so received (with any necessary endorsement).
      This paragraph (iii) shall not apply to dividends among the Subsidiaries
      only of property subject to a perfected security interest under the
      Security Agreement; PROVIDED THAT the Borrower notifies the Collateral
      Agent in writing, specifically referring to this Section 6, at the time of
      such dividend and takes any actions the Collateral Agent reasonably
      specifies to ensure the continuance of its perfected security interest in
      such property under the Security Agreement.

      (b) Upon the occurrence and during the continuance of an Event of Default
and the giving by the Collateral Agent of a notice of its intention to exercise
its remedies, all rights of any Pledgor to dividends, interest or principal that
such Pledgor is authorized to receive pursuant to paragraph (a)(iii) above shall
cease, and all such rights shall thereupon become vested in the Collateral
Agent, which shall have the sole and exclusive right and authority to receive
and retain such dividends, interest or principal. All dividends, interest or
principal received by the Pledgor contrary to the provisions of this Section 6
shall be held in trust for the benefit of the Collateral Agent, shall be
segregated from other property or funds of such Pledgor and shall be forthwith
delivered to the Collateral Agent upon demand in the same form as so received
(with any necessary endorsement). Any and all money and other property paid over
to or received by the Collateral Agent pursuant to the provisions of this
paragraph (b) shall be retained by the Collateral Agent in an account to be
established by the Collateral Agent upon receipt of such money or other property
and shall be applied in accordance with the provisions of Section 8. After all
Events of Default have been cured or waived, the Collateral Agent shall, within
five Business Days after all such Events of Default have been cured or waived,
repay to each Pledgor all cash dividends, interest or principal (without
interest), that such Pledgor would otherwise be permitted to retain pursuant to
the terms of paragraph (a)(iii) above and which remain in such account.

      (c) Upon the occurrence and during the continuance of an Event of Default
and the giving by the Collateral Agent of a notice of its intention to exercise
its remedies, all rights
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                                                                               6


of any Pledgor to exercise the voting and consensual rights and powers it is
entitled to exercise pursuant to paragraph (a)(i) of this Section 6, and the
obligations of the Collateral Agent under paragraph (a)(ii) of this Section 6,
shall cease, and all such rights shall thereupon become vested in the Collateral
Agent, which shall have the sole and exclusive right and authority to exercise
such voting and consensual rights and powers, PROVIDED THAT, unless otherwise
directed by the Required Lenders, the Collateral Agent shall have the right from
time to time following and during the continuance of an Event of Default to
permit the Pledgors to exercise such rights. After all Events of Default have
been cured or waived, such Pledgor will have the right to exercise the voting
and consensual rights and powers that it would otherwise be entitled to exercise
pursuant to the terms of paragraph (a)(i) above.

      SECTION 7. REMEDIES UPON DEFAULT. Upon the occurrence and during the
continuance of an Event of Default, subject to applicable regulatory and legal
requirements, the Collateral Agent may sell the Collateral, or any part thereof,
at public or private sale or at any broker's board or on any securities
exchange, for cash, upon credit or for future delivery as the Collateral Agent
shall deem appropriate. The Collateral Agent shall be authorized at any such
sale (if it deems it advisable to do so) to restrict the prospective bidders or
purchasers to persons who will represent and agree that they are purchasing the
Collateral for their own account for investment and not with a view to the
distribution or sale thereof, and upon consummation of any such sale the
Collateral Agent shall have the right to assign, transfer and deliver to the
purchaser or purchasers thereof the Collateral so sold. Each such purchaser at
any such sale shall hold the property sold absolutely free from any claim or
right on the part of any Pledgor, and, to the extent permitted by applicable
law, the Pledgors hereby waive all rights of redemption, stay, valuation and
appraisal any Pledgor now has or may at any time in the future have under any
rule of law or statute now existing or hereafter enacted.

      The Collateral Agent shall give a Pledgor 10 days' prior written notice
(which each Pledgor agrees is reasonable notice within the meaning of Section
9-504(3) of the Uniform Commercial Code as in effect in the State of New York or
its equivalent in other jurisdictions or successor versions of such Uniform
Commercial Code) of the Collateral Agent's intention to make any sale of such
Pledgor's Collateral. Such notice, in the case of a public sale, shall state the
time and place for such sale and, in the case of a sale at a broker's board or
on a securities exchange, shall state the board or exchange at which such sale
is to be made and the day on which the Collateral, or portion thereof, will
first be offered for sale at such board or exchange. Any such public sale shall
be held at such time or times within ordinary business hours and at such place
or places as the Collateral Agent may fix and state in the notice of such sale.
At any such sale, the Collateral, or portion thereof, to be sold may be sold in
one lot as an entirety or in separate parcels, as the Collateral Agent may (in
its sole and absolute discretion) determine. The Collateral Agent shall not be
obligated to make any sale of any Collateral if it shall determine not to do so,
regardless of the fact that notice of sale of such Collateral shall have been
given. The Collateral Agent may, without notice or publication, adjourn any
public or private sale or cause the same to be adjourned from time to time by
announcement at the time and place fixed for sale, and such sale may, without
further notice, be made at the time and place to which the same was so
adjourned. In case any sale of all or any part of the Collateral is made on
credit or for future delivery, the Collateral so sold may be retained by the
Collateral Agent until the sale price is paid in full by the purchaser or
purchasers thereof, but the Collateral Agent shall not incur any liability in
case any such purchaser or purchasers shall fail to take up and pay for the
Collateral so sold and, in case of any such failure, such Collateral may be sold
again upon like notice. At any public (or, to the extent permitted by applicable
law, private) sale made pursuant to this
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                                                                               7


Section 7, any Secured Party may bid for or purchase, free from any right of
redemption, stay or appraisal on the part of any Pledgor (all said rights being
also hereby waived and released), the Collateral or any part thereof offered for
sale and may make payment on account thereof by using any claim then due and
payable to it from such Pledgor as a credit against the purchase price, and it
may, upon compliance with the terms of sale, hold, retain and dispose of such
property without further accountability to such Pledgor therefor. For purposes
hereof, (a) a written agreement to purchase the Collateral or any portion
thereof shall be treated as a sale thereof, (b) the Collateral Agent shall be
free to carry out such sale pursuant to such agreement and (c) such Pledgor
shall not be entitled to the return of the Collateral or any portion thereof
subject thereto, notwithstanding the fact that after the Collateral Agent shall
have entered into such an agreement all Events of Default shall have been
remedied and the Obligations paid in full. As an alternative to exercising the
power of sale herein conferred upon it, the Collateral Agent may proceed by a
suit or suits at law or in equity to foreclose upon the Collateral and to sell
the Collateral or any portion thereof pursuant to a judgment or decree of a
court or courts having competent jurisdiction or pursuant to a proceeding by a
court-appointed receiver. Any sale pursuant to the provisions of this Section 6
shall be deemed to conform to the commercially reasonable standards as provided
in Section 9-504(3) of the Uniform Commercial Code as in effect in the State of
New York or its equivalent in other jurisdictions.

      SECTION 8. APPLICATION OF PROCEEDS OF SALE. The proceeds of any sale,
foreclosure or other realization upon any Collateral pursuant to Section 7, as
well as any Collateral consisting of cash, shall be applied by the Collateral
Agent as follows:

            FIRST, to the payment of all costs and expenses incurred by the
      Administrative Agent or the Collateral Agent (in its capacity as such
      hereunder or under any other Loan Document) in connection with such sale,
      foreclosure or realization or otherwise in connection with this Agreement,
      any other Loan Document or any of the Obligations, including all court
      costs and the reasonable fees and expenses of its agents and legal
      counsel, the repayment of all advances made by the Collateral Agent
      hereunder or under any other Loan Document on behalf of any Pledgor and
      any other costs or expenses incurred in connection with the exercise of
      any right or remedy hereunder or under any other Loan Document;

            SECOND, to the payment in full of the Obligations (the amounts so
      applied to be distributed among the Secured Parties pro rata in accordance
      with the amounts of the Obligations owed to them on the date of any such
      distribution); and

            THIRD, to the Pledgors, their successors or assigns, or as a court
      of competent jurisdiction may otherwise direct.

      The Administrative Agent shall have absolute discretion as to the time of
application of any such proceeds, moneys or balances in accordance with this
Agreement. Upon any sale of the Collateral by the Collateral Agent (including
pursuant to a power of sale granted by statute or under a judicial proceeding),
the receipt of the purchase money by the Collateral Agent or of the officer
making the sale shall be a sufficient discharge to the purchaser or purchasers
of the Collateral so sold and such purchaser or purchasers shall not be
obligated to see to the application of any part of the purchase money paid over
to the Collateral Agent or such officer or be answerable in any way for the
misapplication thereof.
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                                                                               8


      SECTION 9. REIMBURSEMENT OF COLLATERAL AGENT. (a) Each Pledgor agrees to
pay upon demand to the Collateral Agent the amount of any and all reasonable
expenses, including the reasonable fees, other charges and disbursements of its
counsel and of any experts or agents, that the Collateral Agent may incur in
connection with (i) the administration of this Agreement, (ii) the custody or
preservation of, or the sale of, collec tion from, or other realization upon,
any of the Collateral, (iii) the exercise or enforcement of any of the rights of
the Collateral Agent hereunder or (iv) the failure by such Pledgor to perform or
observe any of the provisions hereof.

      (b) Without limitation of its indemnification obligations under the other
Loan Documents, each Pledgor agrees to indemnify the Collateral Agent and the
Indemnitees (as defined in Section 9.05 of the Credit Agreement) against, and
hold each Indemnitee harmless from, any and all losses, claims, damages,
liabilities and related expenses, including reasonable counsel fees, other
charges and disbursements, incurred by or asserted against any Indemnitee
arising out of, in any way connected with, or as a result of (i) the execution
or delivery of this Agreement or any other Loan Document or any agreement or
instrument contemplated hereby or thereby, the performance by the parties hereto
of their respective obligations thereunder or the consummation of the
Transactions and the other transactions contemplated thereby or (ii) any claim,
litigation, investigation or proceeding relating to any of the foregoing,
whether or not any Indemnitee is a party thereto, PROVIDED that such indemnity
shall not, as to any Indemnitee, be available to the extent that such losses,
claims, damages, liabilities or related expenses are determined by a court of
competent jurisdiction by final and nonappealable judgment to have resulted from
the gross negligence or wilful misconduct of any Indemnitee.

      (c) Any amounts payable as provided hereunder shall be additional
Obligations secured hereby and by the other Security Documents. The provisions
of this Section 9 shall remain operative and in full force and effect regardless
of the termination of this Agreement or any other Loan Document, the
consummation of the transactions contemplated hereby, the repayment of any of
the Obligations, the invalidity or unenforceability of any term or provision of
this Agreement or any other Loan Document or any investigation made by or on
behalf of the Collateral Agent or any other Secured Party. All amounts due under
this Section 9 shall be payable on written demand therefor and shall bear
interest at the rate specified in Section 2.06 of the Credit Agreement.

      SECTION 10. COLLATERAL AGENT APPOINTED ATTORNEY-IN-FACT. Each Pledgor
hereby appoints the Collateral Agent the attorney-in-fact of such Pledgor for
the purpose of carrying out the provisions of this Agreement and taking any
action and executing any instrument that the Collateral Agent may deem necessary
or advisable to accomplish the purposes hereof, which appointment is irrevocable
and coupled with an interest. Without limiting the generality of the foregoing,
the Collateral Agent shall have the right, upon the occurrence and during the
continuance of an Event of Default, with full power of substitution either in
the Collateral Agent's name or in the name of such Pledgor, to ask for, demand,
sue for, collect, receive and give acquittance for any and all moneys due or to
become due under and by virtue of any Collateral, to endorse checks, drafts,
orders and other instruments for the payment of money payable to the Pledgor
representing any interest or dividend or other distribution payable in respect
of the Collateral or any part thereof or on account thereof and to give full
discharge for the same, to settle, compromise, prosecute or defend any action,
claim or proceeding with respect thereto, and to sell, assign, endorse, pledge,
transfer and to make any agreement respecting, or otherwise deal with, the same;
PROVIDED, HOWEVER, that nothing herein contained shall be construed as requiring
or obligating the Collateral Agent
<PAGE>

                                                                               9


to make any commitment or to make any inquiry as to the nature or sufficiency of
any payment received by the Collateral Agent, or to present or file any claim or
notice, or to take any action with respect to the Collateral or any part thereof
or the moneys due or to become due in respect thereof or any property covered
thereby. The Collateral Agent and the other Secured Parties shall be accountable
only for amounts actually received as a result of the exercise of the powers
granted to them herein, and neither they nor their officers, directors,
employees or agents shall be responsible to any Pledgor for any act or failure
to act hereunder, except for their own gross negligence or wilful misconduct.
The Collateral Agent agrees not to exercise the power of attorney provided for
in this Section 10 unless a Default or Event of Default shall have occurred and
be continuing.

      SECTION 11. WAIVERS; AMENDMENT. (a) No failure or delay of the Collateral
Agent in exercising any power or right hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise of any such right or power, or
any abandonment or discontinuance of steps to enforce such a right or power,
preclude any other or further exercise thereof or the exercise of any other
right or power. The rights and remedies of the Collateral Agent hereunder and of
the other Secured Parties under the other Loan Documents are cumulative and are
not exclusive of any rights or remedies that they would otherwise have. No
waiver of any provisions of this Agreement or consent to any departure by any
Pledgor therefrom shall in any event be effective unless the same shall be
permitted by paragraph (b) below, and then such waiver or consent shall be
effective only in the specific instance and for the purpose for which given. No
notice or demand on any Pledgor in any case shall entitle such Pledgor to any
other or further notice or demand in similar or other circumstances.

      (b) Neither this Agreement nor any provision hereof may be waived, amended
or modified except pursuant to a written agreement entered into between the
Collateral Agent and the Pledgor or Pledgors with respect to which such waiver,
amendment or modification is to apply, subject to any consent required in
accordance with Section 9.08 of the Credit Agreement.

      SECTION 12. SECURITIES ACT, ETC. In view of the position of the Pledgors
in relation to the Pledged Securities, or because of other current or future
circumstances, a question may arise under the Securities Act of 1933, as now or
hereafter in effect, or any similar statute hereafter enacted analogous in
purpose or effect (such Act and any such similar statute as from time to time in
effect being called the "FEDERAL SECURITIES LAWS") with respect to any
disposition of the Pledged Securities permitted hereunder. Each Pledgor
understands that compliance with the Federal Securities Laws might very strictly
limit the course of conduct of the Collateral Agent if the Collateral Agent were
to attempt to dispose of all or any part of the Pledged Securities, and might
also limit the extent to which or the manner in which any subsequent transferee
of any Pledged Securities could dispose of the same. Similarly, there may be
other legal restrictions or limitations affecting the Collateral Agent in any
attempt to dispose of all or part of the Pledged Securities under applicable
Blue Sky or other state securities laws or similar laws analogous in purpose or
effect. Each Pledgor recognizes that in light of such restrictions and
limitations the Collateral Agent may, with respect to any sale of the Pledged
Securities, limit the purchasers to those who will agree, among other things, to
acquire such Pledged Securities for their own account, for investment, and not
with a view to the distribution or resale thereof. Each Pledgor acknowledges and
agrees that in light of such restrictions and limitations, the Collateral Agent,
in its sole and absolute discretion, (a) may proceed to make such a sale whether
or not a registration statement for the purpose of registering such Pledged
Securities or part thereof shall have been filed under the Federal Securities
Laws and (b) may approach and negotiate with a single potential
<PAGE>

                                                                              10


purchaser to effect such sale. Each Pledgor acknowledges and agrees that any
such sale might result in prices and other terms less favorable to the seller
than if such sale were a public sale without such restrictions. In the event of
any such sale, the Collateral Agent shall incur no responsibility or liability
for selling all or any part of the Pledged Securities at a price that the
Collateral Agent, in its sole and absolute discretion, may in good faith deem
reasonable under the circumstances, notwithstanding the possibility that a
substantially higher price might have been realized if the sale were deferred
until after registration as aforesaid or if more than a single purchaser were
approached. The provisions of this Section 12 will apply notwithstanding the
existence of a public or private market upon which the quotations or sales
prices may exceed substantially the price at which the Collateral Agent sells.

      SECTION 13. SECURITY INTEREST ABSOLUTE. All rights of the Collateral Agent
hereunder, the grant of a security interest in the Collateral and all
obligations of each Pledgor hereunder, shall be absolute and unconditional
irrespective of (a) any lack of validity or enforceability of the Credit
Agreement, any other Loan Document, any agreement with respect to any of the
Obligations or any other agreement or instrument relating to any of the
foregoing, (b) any change in the time, manner or place of payment of, or in any
other term of, all or any of the Obligations, or any other amendment or waiver
of or any consent to any departure from the Credit Agreement, any other Loan
Document or any other agreement or instrument relating to any of the foregoing,
(c) any exchange, release or nonperfection of any other collateral, or any
release or amendment or waiver of or consent to or departure from any guaranty,
for all or any of the Obligations or (d) any other circumstance that might
otherwise constitute a defense available to, or a discharge of, any Pledgor in
respect of the Obligations or in respect of this Agreement (other than the
indefeasible payment in full of all the Obligations).

      SECTION 14. TERMINATION OR RELEASE. (a) This Agreement and the security
interests granted hereby shall terminate when all the Obligations (other than
wholly contingent indemnification obligations) then due and owing have been
indefeasibly paid in full and the Lenders have no further commitment to lend
under the Credit Agreement, the L/C Exposure has been reduced to zero and the
Issuing Bank has no further obligation to issue Letters of Credit under the
Credit Agreement.

      (b) Upon any sale or other transfer by any Pledgor of any Collateral that
is permitted under the Credit Agreement to any person that is not a Pledgor, or,
upon the effectiveness of any written consent to the release of the security
interest granted hereby in any Collateral pursuant to Section 9.08(b) of the
Credit Agreement, the security interest in such Collateral shall be
automatically released.

      (c) In connection with any termination or release pursuant to paragraph
(a) or (b), the Collateral Agent shall execute and deliver to any Pledgor, at
such Pledgor's expense, all documents that such Pledgor shall reasonably request
to evidence such termination or release. Any execution and delivery of documents
pursuant to this Section 14 shall be without recourse to or warranty by the
Collateral Agent.

      SECTION 15. NOTICES. All communications and notices hereunder shall be in
writing and given as provided in Section 9.01 of the Credit Agreement. All
communications and notices hereunder to any Subsidiary Pledgor shall be given to
it in care of the Borrower.
<PAGE>

                                                                              11


      SECTION 16. FURTHER ASSURANCES. Each Pledgor agrees to do such further
acts and things, and to execute and deliver such additional conveyances,
assignments, agreements and instruments, as the Collateral Agent may at any time
reasonably request in connection with the administration and enforcement of this
Agreement or with respect to the Collateral or any part thereof or in order
better to assure and confirm unto the Collateral Agent its rights and remedies
hereunder.

      SECTION 17. BINDING EFFECT; SEVERAL AGREEMENT; ASSIGNMENTS. Whenever in
this Agreement any of the parties hereto is referred to, such reference shall be
deemed to include the successors and assigns of such party; and all covenants,
promises and agreements by or on behalf of any Pledgor that are contained in
this Agreement shall bind and inure to the benefit of its successors and
assigns. This Agreement shall become effective as to any Pledgor when a
counterpart hereof executed on behalf of such Pledgor shall have been delivered
to the Collateral Agent and a counterpart hereof shall have been executed on
behalf of the Collateral Agent, and thereafter shall be binding upon such
Pledgor and the Collateral Agent and their respective successors and assigns,
and shall inure to the benefit of such Pledgor, the Collateral Agent and the
other Secured Parties, and their respective successors and assigns, except that
no Pledgor shall have the right to assign its rights hereunder or any interest
herein or in the Collateral (and any such attempted assignment shall be void),
except as expressly contemplated by this Agreement or the other Loan Documents.
If all of the capital stock of a Pledgor is sold, transferred or otherwise
disposed of to a person that is not an Affiliate of the Borrower pursuant to a
transaction permitted by Section 6.05 of the Credit Agreement, such Pledgor
shall be released from its obligations under this Agreement without further
action. This Agreement shall be construed as a separate agreement with respect
to each Pledgor and may be amended, modified, supplemented, waived or released
with respect to any Pledgor without the approval of any other Pledgor and
without affecting the obligations of any other Pledgor hereunder.

      SECTION 18. SURVIVAL OF AGREEMENT; SEVERABILITY. (a) All covenants,
agreements, representations and warranties made by each Pledgor herein and in
the certificates or other instruments prepared or delivered in connection with
or pursuant to this Agreement or any other Loan Document shall be considered to
have been relied upon by the Collateral Agent and the other Secured Parties and
shall survive the making by the Lenders of the Loans and the issuance of the
Letters of Credit by the Issuing Bank, regardless of any investigation made by
the Secured Parties or on their behalf, and shall continue in full force and
effect as long as the principal of or any accrued interest on any Loan or any
other fee or amount payable under this Agreement or any other Loan Document is
outstanding and unpaid or the L/C Exposure does not equal zero and as long as
the Commitments and the L/C Commitments have not been terminated.

      (b) In the event any one or more of the provisions contained in this
Agreement should be held invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein shall not in any way be affected or impaired thereby (it being understood
that the invalidity of a particular provision in a particular jurisdiction shall
not in and of itself affect the validity of such provision in any other
jurisdiction). The parties shall endeavor in good-faith negotiations to replace
the invalid, illegal or unenforceable provisions with valid provisions the
economic effect of which comes as close as possible to that of the invalid,
illegal or unenforceable provisions.
<PAGE>

                                                                              12


      SECTION 19. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

      SECTION 20. COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute a single contract, and shall become effective
as provided in Section 18. Delivery of an executed counterpart of a signature
page to this Agreement by facsimile transmission shall be as effective as
delivery of a manually executed counterpart of this Agreement.

      SECTION 21. RULES OF INTERPRETATION. The rules of interpretation specified
in Section 1.02 of the Credit Agreement shall be applicable to this Agreement.
Section headings used herein are for convenience of reference only, are not part
of this Agreement and are not to affect the construction of, or to be taken into
consideration in interpreting this Agreement.

      SECTION 22. JURISDICTION; CONSENT TO SERVICE OF PROCESS. (a) Each Pledgor
hereby irrevocably and unconditionally submits, for itself and its property, to
the nonexclusive jurisdiction of any New York State court or Federal court of
the United States of America sitting in New York City, and any appellate court
from any thereof, in any action or proceeding arising out of or relating to this
Agreement or the other Loan Documents, or for recognition or enforcement of any
judgment, and each of the parties hereto hereby irrevocably and unconditionally
agrees that, to the extent permitted by applicable law, all claims in respect of
any such action or proceeding may be heard and determined in such New York State
or, to the extent permitted by law, in such Federal court. Each of the parties
hereto agrees that a final judgment in any such action or proceeding shall be
conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other manner provided by law. Nothing in this Agreement shall affect any
right that the Collateral Agent or any other Secured Party may otherwise have to
bring any action or proceeding relating to this Agreement or the other Loan
Documents against any Pledgor or its properties in the courts of any
jurisdiction.

      (b) Each Pledgor hereby irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection that it may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of or relating to this Agreement or the other Loan Documents in any
New York State or Federal court. Each of the parties hereto hereby irrevocably
waives, to the fullest extent permitted by law, the defense of an inconvenient
forum to the maintenance of such action or proceeding in any such court.

      (c) Each party to this Agreement irrevocably consents to service of
process in the manner provided for notices in Section 15. Nothing in this
Agreement will affect the right of any party to this Agreement to serve process
in any other manner permitted by law.

      SECTION 23. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO THE
FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY
JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER
OR IN CONNECTION WITH THIS AGREEMENT. EACH PARTY HERETO (A) CERTIFIES THAT NO
REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY
OR OTHERWISE, THAT
<PAGE>

                                                                              13


SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE
FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE
BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL
WAIVERS AND CERTIFICATIONS IN THIS SECTION.

      SECTION 24. ADDITIONAL PLEDGORS. Pursuant to Section 5.12 of the Credit
Agreement, each Domestic Subsidiary of the Borrower (other than any Inactive
Subsidiary) that was not in existence or not a Domestic Subsidiary on the date
of the Credit Agreement is required to enter in this Agreement as a Subsidiary
Pledgor upon becoming a Domestic Subsidiary (or ceasing to be an Inactive
Subsidiary) if such Domestic Subsidiary owns or possesses property of a type
that would be considered Collateral hereunder. Upon execution and delivery by
the Collateral Agent and a Domestic Subsidiary of an instrument in the form of
Annex 1, such Domestic Subsidiary shall become a Subsidiary Pledgor hereunder
with the same force and effect as if originally named as a Subsidiary Pledgor
herein. The execution and delivery of such instrument shall not require the
consent of any Pledgor hereunder. The rights and obligations of each Pledgor
hereunder shall remain in full force and effect notwithstanding the addition of
any new Subsidiary Pledgor as a party to this Agreement.

      SECTION 25. EXECUTION OF FINANCING STATEMENTS. Pursuant to Section 9-402
of the Uniform Commercial Code as in effect in the State of New York or its
equivalent in other jurisdictions, each Pledgor authorizes the Collateral Agent
to file financing statements with respect to the Collateral owned by it without
the signature of such Pledgor in such form and in such filing offices as the
Collateral Agent reasonably determines appropriate to perfect the security
interests of the Collateral Agent under this Agreement. A carbon, photographic
or other reproduction of this Agreement shall be sufficient as a financing
statement for filing in any jurisdiction.
<PAGE>

                                                                              14

      IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement
as of the day and year first above written.


                                    ANTEON CORPORATION,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:


                                    ANALYSIS & TECHNOLOGY, INC.,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:


                                    INTERACTIVE MEDIA CORP.,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:


                                    TECHMATICS, INC.,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:


                                    VECTOR DATA SYSTEMS, INC.,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:
<PAGE>

                                                                              15

                                    AZIMUTH TECHNOLOGIES, INC.,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:
<PAGE>

                                                                              16

                                     MELLON BANK, N.A., as Collateral
                                     Agent,


                                    by:
                                       ----------------------
                                       Name:
                                       Title:
<PAGE>

                                                               Schedule I to the
                                                                Pledge Agreement

                              SUBSIDIARY PLEDGORS

Name
----

Analysis & Technology, Inc.

Interactive Media Corp.

Techmatics, Inc.

Vector Data Systems, Inc.
<PAGE>

                                                              Schedule II to the
                                                                Pledge Agreement

                                EQUITY INTERESTS


          Number of      Registered   Number and Class   Percentage of
Issuer    Certificate    Owner        of Shares          Shares
------    -----------    -----        ---------          ------


                                 DEBT SECURITIES

             Principal
Issuer       Amount           Date of Note      Maturity Date
------       ------           ------------      -------------
<PAGE>

                                                                  Annex 1 to the
                                                                Pledge Agreement

                        SUPPLEMENT NO. dated as of , to the PLEDGE AGREEMENT
                  dated as of June 23, 1999, among ANTEON CORPORATION, a
                  Virginia corporation (the "BORROWER"), AZIMUTH TECHNOLOGIES,
                  INC., a Delaware corporation ("AZIMUTH") and each subsidiary
                  of the Borrower listed on Schedule I hereto (each such
                  subsidiary individually a "SUBSIDIARY PLEDGOR" and
                  collectively, the "SUBSIDIARY PLEDGORS"; the Borrower, Azimuth
                  and Subsidiary Pledgors are referred to collectively herein as
                  the "PLEDGORS") and MELLON BANK, N.A., a national banking
                  association ("MELLON"), as collateral agent (in such capacity,
                  the "COLLATERAL AGENT") for the Secured Parties (as defined in
                  the Credit Agreement referred to below)

      A. Reference is made to (a) the Credit Agreement dated as of June 23, 1999
(as amended, supplemented or otherwise modified from time to time, the "CREDIT
AGREEMENT"), among the Borrower, the lenders from time to time party thereto
(the "LENDERS"), Credit Suisse First Boston, as administrative agent for the
Lenders (in such capacity, the "ADMINISTRATIVE AGENT"), and issuing bank,
Mellon, as Collateral Agent, swingline lender and syndication agent, and
Deutsche Bank A.G., as documentation agent, and (b) the Subsidiary Guarantee
Agreement dated as of June 23, 1999 (as amended, supplemented or otherwise
modified from time to time, the "GUARANTEE AGREEMENT") among the Subsidiary
Pledgors and the Collateral Agent.

      B. Capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to such terms in the Credit Agreement.

      C. The Pledgors have entered into the Pledge Agreement in order to induce
the Lenders to make Loans and the Issuing Bank to issue Letters of Credit.
Pursuant to Section 5.12 of the Credit Agreement, each Domestic Subsidiary of
the Borrower (other than any Inactive Subsidiary) that was not in existence or
not a Domestic Subsidiary on the date of the Credit Agreement is required to
enter into the Pledge Agreement as a Subsidiary Pledgor upon becoming a Domestic
Subsidiary (or ceasing to be an Inactive Subsidiary) if such Domestic Subsidiary
owns or possesses property of a type that would be considered Collateral under
the Pledge Agreement. Section 24 of the Pledge Agreement provides that such
Domestic Subsidiaries may become Subsidiary Pledgors under the Pledge Agreement
by execution and delivery of an instrument in the form of this Supplement. The
undersigned Domestic Subsidiary (the "NEW PLEDGOR") is executing this Supplement
in accordance with the requirements of the Credit Agreement to become a
Subsidiary Pledgor under the Pledge Agreement in order to induce the Lenders to
make additional Loans and the Issuing Bank to issue additional Letters of Credit
and as consideration for Loans previously made and Letters of Credit previously
issued.

      Accordingly, the Collateral Agent and the New Pledgor agree as follows:

      SECTION 1. In accordance with Section 24 of the Pledge Agreement, the New
Pledgor by its signature below becomes a Pledgor under the Pledge Agreement with
the same force and effect as if originally named therein as a Pledgor and the
New Pledgor hereby agrees (a) to all the terms and provisions of the Pledge
Agreement applicable to it as a Pledgor thereunder and (b) represents and
warrants that the representations and warranties made by it as a Pledgor
thereunder are true and correct on and as of the date
<PAGE>
                                                                               2


hereof. In furtherance of the foregoing, the New Pledgor, as security for the
payment and performance in full of the Obligations (as defined in the Pledge
Agreement), does hereby create and grant to the Collateral Agent, its successors
and assigns, for the benefit of the Secured Parties, their successors and
assigns, a security interest in and lien on all of the New Pledgor's right,
title and interest in and to the Collateral (as defined in the Pledge Agreement)
of the New Pledgor. Each reference to a "Subsidiary Pledgor" or a "Pledgor" in
the Pledge Agreement shall be deemed to include the New Pledgor. The Pledge
Agreement is hereby incorporated herein by reference.

      SECTION 2. The New Pledgor represents and warrants to the Collateral Agent
and the other Secured Parties that this Supplement has been duly authorized,
executed and delivered by it and constitutes its legal, valid and binding
obligation, enforceable against it in accordance with its terms.

      SECTION 3. This Supplement may be executed in counterparts, each of which
shall constitute an original, but all of which when taken together shall
constitute a single contract. This Supplement shall become effective when the
Collateral Agent shall have received counterparts of this Supplement that, when
taken together, bear the signatures of the New Pledgor and the Collateral Agent.
Delivery of an executed signature page to this Supplement by facsimile
transmission shall be as effective as delivery of a manually signed counterpart
of this Supplement.

      SECTION 4. The New Pledgor hereby represents and warrants that set forth
on Schedule I attached hereto is a true and correct schedule of all its Pledged
Securities.

      SECTION 5. Except as expressly supplemented hereby, the Pledge Agreement
shall remain in full force and effect.

      SECTION 6. THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

      SECTION 7. In case any one or more of the provisions contained in this
Supplement should be held invalid, illegal or unenforceable in any respect,
neither party hereto shall be required to comply with such provision for so long
as such provision is held to be invalid, illegal or unenforceable, but the
validity, legality and enforceability of the remaining provisions contained
herein and in the Pledge Agreement shall not in any way be affected or impaired.
The parties hereto shall endeavor in good-faith negotiations to replace the
invalid, illegal or unenforceable provisions with valid provisions the economic
effect of which comes as close as possible to that of the invalid, illegal or
unenforceable provisions.

      SECTION 8. All communications and notices hereunder shall be in writing
and given as provided in Section 16 of the Pledge Agreement. All communications
and notices hereunder to the New Pledgor shall be given to it in care of the
Borrower.

      SECTION 9. The New Pledgor agrees to reimburse the Collateral Agent for
its reasonable out-of-pocket expenses in connection with this Supplement,
including the reason able fees, other charges and disbursements of counsel for
the Collateral Agent.
<PAGE>

                                                                               3


      IN WITNESS WHEREOF, the New Pledgor and the Collateral Agent have duly
executed this Supplement to the Pledge Agreement as of the day and year first
above written.

                                    [Name of New Pledgor],


                                    by:
                                       --------------------------
                                       Name:
                                       Title:
                                       Address:


                                     MELLON BANK, N.A., as Collateral
                                     Agent,


                                    by:
                                       --------------------------
                                       Name:
                                       Title:
<PAGE>

                                                                   Schedule I to
                                                                  Supplement No.
                                                         to the Pledge Agreement

                      PLEDGED SECURITIES OF THE NEW PLEDGOR


                                EQUITY INTERESTS


          Number of      Registered   Number and Class   Percentage of
Issuer    Certificate    Owner        of Shares          Shares
------    -----------    -----        ---------          ------


                                 DEBT SECURITIES

             Principal
Issuer       Amount           Date of Note      Maturity Date
------       ------           ------------      -------------
