Document:

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EXHIBIT 10.02

ORACLE CORPORATION

1993 DIRECTORS' STOCK OPTION PLAN
(as amended and adjusted for stock splits through August 8, 2001)

1.   Establishment and Purpose.

     (a)  Establishment. There is hereby adopted the 1993 Directors' Stock
          Option Plan (the "Plan" of Oracle Corporation, a Delaware corporation
          (the "Company"). The Plan is intended to provide a means whereby
          eligible members of the Board of Directors of the Company may be given
          an opportunity to purchase shares of Common Stock of the Company
          pursuant to options which are not intended to qualify as incentive
          stock options under Section 422 of the Internal Revenue Code of 1986,
          as amended.

     (b)  Purpose. The purpose of the Plan is to enable the Company to attract
          and retain the best available individuals for service as members of
          the Board of Directors of the Company, to provide additional incentive
          to such individuals while serving as directors, and to encourage their
          continued service on the Board of Directors.

2.   Definitions.

     As used herein, the following definitions shall apply:

     (a)  "Board" shall mean the Board of Directors of the Company.

     (b)  "Code" shall mean the Internal Revenue Code of 1986, as amended.

     (c)  "Committee" shall mean the Committee or Committees referred to in
          Section 4 of the Plan. If at any time no Committee shall be in office,
          then the functions of the Committee specified in the Plan shall be
          exercised by the Board.

     (d)  "Common Stock" shall mean the Common Stock, $.01 par value per share,
          of the Company.

     (e)  "Continuous Status as a Director" shall mean the absence of any
          interruption or termination of service as a Director.

     (f)  "Director" shall mean a member of the Board.

     (g)  "Employee" shall mean any person, including officer and Directors, who
          is an employee of the Company, or any Subsidiary of the Company, for
          purposes of tax withholding under the Code. The payment of a
          director's fee by the Company shall not be sufficient to and in of
          itself to constitute "employment" by the Company.

     (h)  "Exchange Act" shall mean the Securities Exchange Act of 1934, as
          amended.

     (i)  "Fair Market Value" shall mean, as of any date, the value of Common
          Stock determined as follows:

          (i)   the last reported sale price of the Common Stock of the Company
                on the Nasdaq National Market or, if no such reported sale takes
                place on any such day, the average of the closing bid and asked
                prices, or

          (ii)  if such Common Stock shall then be listed on a national
                securities exchange, the last reported sale price or, if no such
                reported sale takes place on any such day, the average of the
                closing bid and asked prices on the principal national
                securities exchange on which the Common Stock is listed or
                admitted to trading, or

          (iii) if such Common Stock shall not be quoted on such National Market
                nor listed or admitted to trading on a national securities
                exchange, then the average of the closing bid and asked prices,
                as reported by The Wall Street Journal for the over-the-counter
                market, or

          (iv)  if none of the foregoing is applicable, then the Fair Market
                Value of a share of Common Stock shall be determined in good
                faith by the Committee at its discretion.
<PAGE>

     (j)  "Option" shall mean an option to purchase shares of Common Stock
          granted pursuant to the Plan.

     (k)  "Optioned Stock" shall mean the Common Stock subject to an Option.

     (l)  "Optionee" shall mean an Outside Director who receives an Option.

     (m) "Outside Director" shall mean a Director who is not an Employee.

     (n) "Parent" shall mean a "parent corporation" whether now or hereafter
         existing, as defined in Section 424(e) of the Code.

     (o) "Securities Act" shall mean the Securities Act of 1933, as amended.

     (p) "Share" shall mean a share of the Common Stock, as adjusted in
         accordance with Section 13 of the Plan.

     (q) "Significant Committees" shall mean the Executive Committee and the
         Finance and Audit Committee of the Board.

     (r) "Subsidiary" shall mean a "subsidiary corporation", whether now or
         hereafter existing, as defined in Section 424(f) of the Code.

3.   Shares Subject to the Plan.

          Subject to the provisions of Section 13 of the Plan, the maximum
     number of Shares which may be optioned and sold under the Plan is
     20,250,000 shares of Common Stock. If an Option expires or becomes
     unexercisable for any reason and has not been exercised in full, the Shares
     subject to such Options shall become available for future grant under the
     Plan. If Shares which were acquired upon exercise of an Option are
     subsequently repurchased by the Company, such Shares shall not become
     available for future grant under the Plan.

4.   Administration of the Plan.

     (a)  Administrator. The Plan shall be administered by the Board or by the
          Committee appointed by the Board, which shall consist of two or more
          members of the Board. The Committee shall select one of its members as
          chairman, and shall hold meetings at such times and places as it may
          determine. A majority of the Committee shall constitute a quorum and
          acts of the Committee at which a quorum is present, or acts reduced to
          or approved in writing by all the members of this Committee, shall be
          the valid acts of the Committee.

     (b)  Powers of the Committee. Subject to the provisions and restrictions of
          the Plan, the Committee shall have the authority, in its discretion,
          to: (i) determine the Fair Market Value of the Common Stock; (ii)
          determine the exercise price per Share; (iii) interpret the Plan; (iv)
          subject to Section 14, amend the Plan or any Option; (v) authorize any
          person to execute on behalf of the Company any agreements or other
          documents in connection with the grant of an Option under the Plan;
          (vi) approve forms of agreement for use under the Plan; and (vii) make
          all other determinations deemed necessary or advisable for the
          administration of the Plan.

     (c)  Effects of Committee's Decision. All decisions, determinations and
          interpretations of the Committee shall be final and binding on all
          holders of any Options granted under the Plan.

5.   Option grants.

     (a)  Automatic Grants. All Grants of Options Hereunder shall be automatic
          and nondiscretionary and shall be made strictly in accordance with the
          provisions of this Section 5. No person shall have any discretion to
          select which Outside Directors shall be granted Options or to
          determine the number of Shares to be covered by Options granted to
          Outside Directors.

     (b)  Initial Grants. Each individual who becomes an Outside Director after
          August 8, 2001, as of the date on
<PAGE>

          which such person becomes an Outside Director shall be granted
          automatically an Option to purchase 80,000 shares.

     (c)  Subsequent Grants.

          (i)   On May 31 of each year after May 31, 2001, each Outside Director
                shall be granted automatically an option to purchase 40,000
                shares, provided that on such date the Outside Director has
                served on the Board for at least six months.

          (ii)  On May 31 of each year commencing May 31, 2002, each Outside
                Director that is the Chairman of both Significant Committees
                shall be granted automatically an Option to purchase 120,000
                shares, provided that on such date the Outside Director has
                served as the Chairman of both Significant Committees for at
                least one year. This grant of 120,000 shares shall be in lieu of
                and not in addition to the options granted under Section 5(c)(i)
                hereof.

          (iii) On May 31 of each year commencing May 31, 2002, the Chairman of
                the Compensation Committee shall be granted automatically an
                Option to purchase 100,000 shares, provided that on such date
                the Outside Director has served on the Compensation Committee
                for at least one year. This grant of 100,000 shares shall be in
                lieu of and not in addition to the options granted under Section
                5(c)(i) hereof.

          (iv)  On May 31 of each year commencing May 31, 2002, the Vice
                Chairman of the Finance and Audit Committee shall be granted
                automatically an Option to purchase 60,000 shares, provided that
                on such date the Outside Director has served in such capacity
                for at least six months. This grant of 60,000 shares shall be in
                lieu of and not in addition to the options granted under Section
                5(c)(i) hereof.

     (d) Limitations.

          (i)   Notwithstanding the provisions of Sections 5(b) and 5(c) hereof,
                in the event that a sufficient number of Shares is not available
                under the Plan, the remaining Shares shall be prorated based
                upon the number of Shares each Director was entitled to receive
                under this Plan. Any further grants shall then be deferred until
                such time, if any, as additional Shares become available for
                grant under the Plan. Subject to the terms of Section 14 hereof,
                the Board shall have the authority at any time to make
                additional Shares available for grant under the Plan, subject to
                obtaining stockholder approval of such increase to the extent
                required under Section 14(a) hereof.

          (ii)  Notwithstanding the provisions of Section 5(b) and 5(c) hereof,
                any grant of an Option made before the Company has obtained
                stockholder approval of the Plan and any grant of an Option made
                after amendment of the Plan where such amendment of the Plan
                requires stockholder approval under Section 14(a) hereof shall
                be conditioned upon obtaining such stockholder approval.

6.   Terms and Conditions of Options.

     (a)  Stock Option Agreement. Each Option granted pursuant to this Plan
          shall be evidenced by a written stock option agreement ("Stock Option
          Agreement") executed by the Company and the Outside Director
          containing such terms and conditions that are consistent with this
          Plan and as otherwise determined by the Committee.

     (b)  Exercise Price. The exercise price per share shall be 100% of the Fair
          Market Value per Share on the date of grant of the Option, subject to
          adjustment to the extent provided in Section 13 hereof.

     (c)  Vesting. The Shares shall vest and become exercisable at the rate of
          twenty-five percent (25%) of the Optioned Stock on each anniversary of
          the date of grant.

     (d)  Term. The term of each Option shall be ten (10) years from the date of
          grant, unless a shorter period is required to comply with any
          applicable law, in which case such shorter period will apply.

7.   Eligibility. Options may be granted only to Outside Directors. The Plan
     shall not confer upon any Outside Director any right with respect to
     continuation of service as a Director or nomination to serve as a Director,
     nor shall it interfere in any way with any rights which the Director or the
     Company may have to terminate his or her directorship at any time.

8.   Term of Plan; Effective Date. The Plan shall become effective on May 24,
     1993. Options may be granted under this Plan at any time on or before May
     24, 2003.
<PAGE>

9.   Payment Upon Exercise. Payment of the exercise price upon exercise of any
     Option shall be made (i) by cash or check; (ii) provided that a public
     market for the Company's stock exists, through a "same day sale" commitment
     from the Optionee and a broker-dealer that is a member of the National
     Association of Securities Dealers (an "NASD Dealer") whereby Optionee
     irrevocably elects to exercise the Option and to sell a portion of the
     Shares so purchased to pay for the exercise price and whereby the NASD
     Dealer irrevocably commits upon receipt of such Shares to forward the
     exercise price directly to the Company; (iii) provided that a public market
     for the Company's stock exists, through a "margin" commitment from the
     Optionee and an NASD Dealer whereby the Optionee irrevocably elects to
     exercise the Option and to pledge the Shares so purchased to the NASD
     Dealer in a margin account as security for a loan from the NASD Dealer in
     the amount of the exercise price, and whereby the NASD Dealer irrevocably
     commits upon receipt of such Shares to forward the exercise price directly
     to the Company; (iv) where permitted by applicable law, by tender of a full
     recourse promissory note secured by collateral other than the Shares having
     such terms as may be approved by the Committee and bearing interest at a
     rate sufficient to avoid imputation of income under Sections 483 and 1274
     of the Code, provided that the portion of the exercise price equal to the
     par value of the Shares must be paid in cash or other legal consideration;
     or (v) in any combination of the foregoing.

10.  Withholding Taxes. Whenever, under the Plan, Shares are to be issued in
     satisfaction of the exercise of Options granted hereunder, the Company
     shall have the right to require the recipient to remit to the Company an
     amount of cash sufficient to satisfy any applicable federal, state or local
     income and employment tax withholding requirements prior to the delivery of
     any certificate or certificates for such Shares.

11.  Exercise of Option.

     (a)  Procedure for Exercise. An Option shall be deemed to be exercised when
          written notice of such exercise has been given to the Company in
          accordance with the terms of the Option agreement by the person
          entitled to exercise the Option and full payment for the Shares has
          been received by the Company in accordance with Section 9 hereof. An
          Option may not be exercised for a fraction of a Share.

     (b)  Rights as a Stockholder. Notwithstanding the exercise of the Option,
          until the issuance (as evidenced by the appropriate entry on the books
          of a duly authorized transfer agent of the Company) of the stock
          certificate evidencing such Shares, no right to vote or receive
          dividends or any other rights as a stockholder shall exist with
          respect to the Optioned Stock. A stock certificate for the number of
          Shares so acquired shall be issued to the Optionee as soon as
          practicable after exercise of the Option. No adjustment will be made
          for a dividend or other right if the record date is prior to the date
          the stock certificate is issued.

     (c)  Termination of Status as Director. If an Outside Director ceases to
          serve as a Director, he or she may, but only within three (3) months
          (or such other period of time not exceeding six (6) months as is
          determined by the Board) after the date he or she ceases to be a
          Director of the Company, exercise his or her Option to the extent that
          he or she was entitled to exercise it at the date of such termination.
          Notwithstanding the foregoing, in no event may the Option be exercised
          after its term set forth in Section 6 has expired. To the extent that
          such Outside Director was not entitled to exercise and Option at the
          date of termination, or if Optionee does not exercise such Option
          (which he or she was entitled to exercise) within the time specified,
          the Option shall terminate.

     (d)  Disability of Director. Notwithstanding the provisions of Section
          11(c) above, in the event an Outside Director is unable to continue
          his service as a Director with the Company as a result of his total
          and permanent disability (as defined in Section 22(e)(3) of the Code),
          he may, within six months from the date of such termination, exercise
          his Option to the extent he was entitled to exercise it at the date of
          such termination. Notwithstanding the foregoing, in no event may the
          Option be exercised after the expiration of the term set forth in
          Section 6. To the extent that Optionee was not entitled to exercise
          the Option at the date of termination, or if Optionee does not
          exercise such Option (which he was entitled to exercise) within the
          time specified herein, the Option shall terminate.

     (e)  Death of Optionee. In the event of the death of an Outside Director:

          (i)  If the Outside Director dies during the term of the Option, is a
               Director at the time of his death and has been in Continuous
               Status as a Director since the date of grant of the Option, the
               Option may be exercised at any time within six (6) months
               following the date of death by the Outside
<PAGE>

               Director's estate or by a person who acquired the right to
               exercise the Option by bequest or inheritance, but only to the
               extent the Outside Director was entitled to exercise the Option
               at the date of termination. Notwithstanding the foregoing, in no
               event may the Option be exercised after the expiration of the
               term set forth in Section 6.

          (ii) If the Outside Director dies within three (3) months after the
               termination of Continuous Status as a Director, the Option may be
               exercised at any time within six (6) months following the date of
               death by the Optionee's estate or by a person who acquired the
               right to exercise the Option by bequest or inheritance, but only
               to the extent the Outside Director was entitled to exercise the
               Option at the date of termination. Notwithstanding the foregoing,
               in no event may the Option be exercised more than ten (10) years
               after its date of grant.

12.  Nontransferability of Options. Options granted under this Plan, and any
     interest therein, shall not be transferable or assignable by the Optionee,
     and may not be made subject to execution, attachment or similar process,
     otherwise than by will or by the laws of descent and distribution, and
     shall be exercisable during the lifetime of the Optionee only by the
     Optionee; provided, however; that Options held by an Optionee may be
     transferred to such family members, trusts and charitable institutions as
     the Committee, in its sole discretion, shall approve, unless otherwise
     restricted from such transfer under the terms of the Grant. The designation
     of a beneficiary by an Optionee does not constitute a transfer.

13.  Adjustment Upon Changes in Capitalization.

     (a)  Adjustment of Shares. In the event that the number of outstanding
          shares of Common Stock of the Company is changed by a stock dividend,
          stock split, reverse stock split, combination, reclassification or
          similar change in the capital structure of the Company without
          consideration, the number of Shares available under this Plan, the
          number of Shares deliverable in connection with any Option and the
          exercise price per share of such Options shall be proportionately
          adjusted, subject to any required action by the Board or stockholders
          of the Company and compliance with applicable securities laws;
          provided however, that no certificate or scrip representing fractional
          shares shall be issued and any resulting fractions of a share shall be
          ignored.

     (b)  Assumption. In the event of a dissolution or liquidation of the
          Company, a merger in which the Company is not the surviving
          corporation (other than a merger with a wholly owned subsidiary or
          where there is no substantial change in the stockholders of the
          Company and the obligations of the Company under this Plan are assumed
          by the successor corporation), the sale of substantially all of the
          assets of the Company, or any other transaction described under
          Section 424(a) of the Code wherein the stockholders of the Company
          give up all of their equity interest in the Company (except for the
          acquisition of all or substantially all of the outstanding shares of
          the Company), all outstanding Options, notwithstanding any contrary
          terms of the Plan, shall accelerate and become exercisable in full
          prior to and shall expire on the consummation of such dissolution,
          liquidation, merger or sale of assets.

     (c)  Acceleration Upon Unfriendly Takeover. Notwithstanding anything in
          Section 13(b) hereof to the contrary, if fifty percent (50%) or more
          of the outstanding voting securities of the Company become
          beneficially owned (as defined in Rule 13d-3 promulgated by the
          Securities and Exchange Commission) by a person (as defined in Section
          2(2) of the Securities Act and in Section 13(d)(3) of the Exchange
          Act) in a transaction or series of transactions expressly disapproved
          by the Board, then all outstanding Options under this Plan shall
          become immediately exercisable with no further act or action required
          by the Committee.

14.  Amendment and Termination of the Plan.

     (a)  Amendment. The Board or the Committee may amend the Plan from time to
          time in such respects as the Board or the Committee, as the case may
          be, may deem advisable; provided that, to the extent necessary to
          comply with Rule 16b-3 under the Exchange Act (or any other applicable
          law or regulation), the Company shall obtain approval of the Company's
          stockholders to amend the Plan to the extent and in the manner
          required by such law or regulation.

     (b)  Termination or Suspension. The Committee, without further approval of
          the stockholders, may at any time terminate or suspend the Plan.
          Except as otherwise provided herein, any such termination or
          suspension of the Plan shall not affect Options already granted
          hereunder and such Options shall remain in
<PAGE>

          full force and effect as if the Plan had not been terminated or
          suspended.

     (c)  Outstanding Options. Except as otherwise provided herein, rights and
          obligations under any outstanding Option shall not be altered or
          impaired by amendment, suspension or termination of the Plan, except
          with the consent of the person to whom the Option was granted. The
          Committee shall have the authority to modify, extend or renew
          outstanding Options and to authorize the grant of new Options in
          substitution therefor.

15.  Conditions Upon Issuance of Shares. Shares shall not be issued pursuant to
     the exercise of an Option unless the exercise of such Option and the
     issuance and delivery of such Shares pursuant thereto shall comply with all
     relevant provisions of law, including, without limitation, the Securities
     Act, the Exchange Act, the rules and regulations promulgated thereunder,
     state securities laws, and the requirements of any stock exchange upon
     which the Shares may then be listed, and shall be further subject to the
     approval of counsel for the Company with respect to such compliance.

As a condition to the exercise of an Option, the Company may require the person
exercising such Option to represent and warrant at the time of any such exercise
that the Shares are being purchased only for investment and without any present
intention to sell or distribute such Shares, if, in the opinion of counsel for
the Company, such a representation is required by any of the relevant provisions
of the law.

Inability of the Company to obtain authority from any regulatory body having
jurisdictional authority deemed by the Company's counsel to be necessary for the
lawful issuance and sale of any Shares hereunder shall relieve the Company of
any liability for failure to issue or sell such Shares.

16.  Reservation of Shares. The Company, during the term of this Plan, will at
     all times reserve and keep available such number of Shares as shall be
     sufficient to satisfy the requirements of the Plan.

17.  Stockholder Approval. This Plan shall be approved by the stockholders of
     the Company, in any manner permitted by applicable corporate law, within
     twelve months after the date this Plan is adopted by the Board. In the
     event that stockholder approval is not obtained within the time period
     provided herein, all awards previously granted hereunder shall terminate.

18.  Additional Restrictions of Rule 16b-3. The terms and conditions of options
     granted hereunder to persons subject to Section 16 of the Exchange Act
     shall comply with the applicable provisions of Rule 16b-3. This Plan and
     the options granted hereunder shall be deemed to contain such additional
     conditions and restrictions as may be required for this Plan to qualify as
     a "formula plan" under Rule 16b-3, as then applicable to the Company, and
     to qualify for the maximum exemptions from Section 16 of the Exchange Act
     with respect to Plan transactions.<PAGE>

                                                                    EXHIBIT 10.1

                        FIRST AMENDMENT TO AMENDED AND
                           RESTATED CREDIT AGREEMENT

     This First Amendment to Amended and Restated Credit Agreement ("Amendment")
is entered into as of July 19, 2001.

                                   RECITALS
                                   --------

     This Amendment is entered into in reference to the following facts:

          (a)  The Amended and Restated Credit Agreement is dated as of
February 9, 2001 and made between Wireless Facilities Inc., as Borrower, the
financial institutions from time to time party thereto as Banks, Credit Suisse
First Boston as Sole Lead Arranger, Administrative Agent and Collateral Agent,
Bank One Arizona, N.A. as Syndication Agent, and Bank of America N.A., as
Documentation Agent (as the same may be amended, restated, supplemented and
otherwise modified, the "Credit Agreement"). Capitalized terms used herein,
without definition shall have the meaning assigned thereto in the Credit
Agreement.

          (b)  The Borrower, the Agents and the Banks executing this Amendment
desire to amend the Credit Agreement in certain respects, subject to the terms
hereof.

     NOW THEREFORE, in consideration of the mutual covenants contained herein,
the parties hereto hereby agree as follows:

                            ARTICLE I - AMENDMENTS
                            ----------------------

          1.1  Amendment of Section 1.1. Section 1.1 of the Credit Agreement
               ------------------------
shall be amended:

     (a)  by deleting the definition of EBITDA set forth therein and
substituting the following therefor:

               "EBITDA" shall mean for any period, the EBIT of the Borrower and
its Consolidated Subsidiaries for such period adjusted by (i) adding thereto (x)
the amount of all amortization of intangibles and depreciation that were
deducted in arriving at such EBIT for such period and (y) to the extent, but
only to the extent, deducted in determining EBIT for such period, the amounts
set forth in Schedule 14
<PAGE>

with respect to the categories described thereon; provided that such amounts
                                                  --------
shall not, in any event, exceed $12.0 million with respect to the first Fiscal
Quarter of 2001 and shall not exceed $23.1 million with respect to the second
Fiscal Quarter of 2001, and (ii) subtracting therefrom the amount of all non-
cash gains that were not excluded pursuant to the definition of "Net Income" for
such period, each as determined in conformity with GAAP.";

     (b)  by adding in alphabetical order a new definition as follows:

     "First Amendment Effective Date" means July 19, 2001.";

     (c)  by adding at the end of the definition of "Applicable Base Rate
Margin" the following:

     "; provided further, that for the purpose of calculating Applicable Base
        -------- -------
Rate Margin, EBITDA shall be calculated in accordance with the definition of
such term as in effect immediately prior to the First Amendment Effective
Date.";

     (d)  by adding at the end of the definition of "Applicable LIBOR Margin"
the following:

     "; provided further, that for the purpose of calculating Applicable LIBOR
        -------- -------
Margin, EBITDA shall be calculated in accordance with the definition of such
term as in effect immediately prior to the First Amendment Effective Date."; and

     (e)  by adding at the end of the definition of "Applicable Commitment Fee
Percentage" the following:

     "; provided further, that for the purpose of calculating Applicable
        -------- -------
Commitment Fee Percentage, EBITDA shall be calculated in accordance with the
definition of such term as in effect immediately prior to the First Amendment
Effective Date."

          1.2  Limitation on Aggregate Credit Exposures. Section 2.1 shall be
               ----------------------------------------
amended by adding the following Section 2.1(c):

     "(c) Notwithstanding anything to the contrary contained herein, at no time
during the period from October 1, 2001 through March 30, 2002, shall aggregate
Credit Exposures of the Banks exceed $59.0 million."

                                       2
<PAGE>

          1.3  Additional Condition to Credit Events. Section 4.3 shall be
               -------------------------------------
amended by adding the following additional Section 4.3(d):

     "(d) On the date of such Credit Event (a) after giving effect to such
Credit Event, the ratio of Senior Debt as of the date of such Credit Event to
EBITDA for the four Fiscal Quarter period most recently ended prior to such
Credit Event, shall not exceed (x) 2.75:1.00 with respect to any determination
made on any date during the period from October 1, 2001 through December 30,
2001, (y) 3.55:1.00 with respect to any determination made on any date during
the period from December 31, 2001 through March 30, 2002 and (z) 2:00:1.00 with
respect to any determination made on any other date and (b) the Borrower shall
have delivered to Banks a certificate signed by an Authorized Representative and
dated as of the date of such Credit Event certifying and demonstrating
compliance with the requirements of this Section 4.3(d)."

          1.4  Amendment of Section 7.9: Leverage Covenant. Section 7.9 shall be
               -------------------------------------------
amended in its entirety as follows:

     "; provided that, with respect to the measurement made as of the last day
        --------
of the fourth Fiscal Quarter of 2001, notwithstanding the foregoing, the Senior
Leverage Ratio shall be required not to exceed 3.55:1.00."

          1.5  Amendment of Section 10.18. Section 10.18 shall be amended to
               --------------------------
correct the typographical error therein by deleting the words "under the
Existing Credit Agreement are made on or before February 9, 2000" from the
second and third lines of the first sentence thereof and substituting therefor
the words "on or before February 9, 2001" and further by adding at the end of
such sentence, the words "under the Existing Credit Agreement are made."

          1.6  Addition of Schedule 14. The Schedules to the Credit Agreement
               -----------------------
shall be amended by adding a new Schedule 14 in the form of Annex A to this
Amendment.

          1.7  Credit Documents. It is agreed that the definition of "Credit
               ----------------
Document" in the Credit Agreement shall include this Amendment and each
Reaffirmation of Guaranty delivered pursuant to Section 3.1(b) hereof.

                  ARTICLE II - REPRESENTATIONS AND WARRANTIES
                  -------------------------------------------

                                       3
<PAGE>

          2.1  Borrower Representations and Warranties. In order to induce the
               ---------------------------------------
Agents and the Banks to enter into this Amendment the Borrower represents and
warrants as follows:

               (a)  The Borrower has the power and authority and has taken all
action necessary to execute, deliver and perform this Amendment and all other
agreements and instruments executed or delivered or to be executed or delivered
in connection herewith and therewith and this Amendment and such other
agreements and instruments constitute the valid, binding and enforceable
obligations of the Borrower (except as such enforceability may be limited by (i)
bankruptcy, insolvency, reorganization or other similar laws affecting the
enforcement of creditors rights generally and (ii) general principles of equity
(regardless of whether such enforceability is considered in a proceeding in
equity or at law)).

               (b)  After giving effect to the amendments set forth in ARTICLE
I, the Borrower's representations and warranties contained in the Credit
Agreement are true and correct in all respects on and as of the date hereof as
though made on and as of the date hereof (except representations and warranties
made specifically as of another date which are true and correct as of such other
date) and no Default or Event of Default has occurred and is continuing as of
the date hereof.

          2.2  Acknowledgment of Borrower. The Borrower expressly acknowledges
               --------------------------
and agrees that as of the date hereof, it has no offsets, claims or defenses
whatsoever against any of the Indebtedness or Obligations.

                      ARTICLE III - CONDITIONS PRECEDENT
                      ----------------------------------

          3.1  Conditions to Effectiveness of this Amendment. The effectiveness
               ---------------------------------------------
of this Amendment is subject to the satisfaction of the following conditions:

               (a)  Each Guarantor shall have executed and delivered to the
Agent a counterpart to the Reaffirmation of Guaranty in substantially the form
of the Exhibit I attached hereto (the "Reaffirmation of Guaranty").

               (b)  The Borrower shall have paid (i) to the Administrative
Agent, for distribution to each Bank executing this Amendment, an amendment fee
equal to 0.25% of such Bank's commitment; and (ii) all reasonable fees, costs
and expenses owing to the Administrative Agent, the Banks and the Administrative
Agent's counsel through the First Amendment Effective Date.

                                       4
<PAGE>

                        ARTICLE IV - GENERAL PROVISIONS
                        -------------------------------

          4.1  Full Force and Effect. Except as expressly amended hereby, the
               ---------------------
Credit Documents and all other documents, agreements and instruments relating to
thereto are and shall remain unmodified and in full force and effect.

          4.2  Counterparts. This Amendment may be executed in any number of
               ------------
counterparts, each of which when so executed and delivered shall be deemed to be
an original and that all of which taken together shall constitute one and the
same instrument, respectively. Delivery of an executed counterpart of this
Amendment by facsimile shall be equally effective as delivery of a manually
executed counterpart of this Amendment. Any party delivering an executed
counterpart by facsimile shall also deliver a manually executed counterpart of
this Amendment, but failure to do so shall not effect the validity,
enforceability, of binding effect of this Amendment.

          4.3  Final Agreement. This Amendment is intended by the Borrower, the
               ---------------
Agents and the Banks to be the final, complete, and exclusive expression of the
agreement between them with respect to the subject matter hereof. This Amendment
supersedes any and all prior oral or written agreements relating to the subject
matter hereof.

          4.4  Effectiveness. This First Amendment to the Amended and Restated
               -------------
Credit Agreement shall become effective on the date (the "First Amendment
                                                          ---------------
Effective Date") on or before July 27, 2001 on which the later of the following
--------------
occurs (i) the Borrower and each of the Agents and Required Banks and Issuing
Banks shall have signed a copy hereof (whether the same or different copies) and
shall have delivered the same to the Administrative Agent or, in the case of the
Banks and Issuing Banks, shall have given to the Administrative Agent telephone
(confirmed in writing), written or telex notice (actually received) that the
same has been signed and mailed to it, and (ii) the conditions precedent set
forth in Article III hereof shall be satisfied or waived in accordance with the
terms hereof. The Administrative Agent will give the Borrower, each Bank and
each Issuing Bank prompt written notice of the occurrence of the First Amendment
Effective Date.

                                       5
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed by their duly authorized officers as of the date first above
written.

WIRELESS FACILITIES, INC.               CREDIT SUISSE FIRST BOSTON
as Borrower                             as a Sole Lead Arranger, Administrative
                                        Agent, Collateral Agent, an Issuing
By: /s/ Terry Ashwill                   Bank and a Bank
    ----------------------------------
    Name: Terry Ashwill
         -----------------------------  By: Robert Hetu
    Title: EVP/Chief Financial Officer      ---------------------------------
          ----------------------------      Name: Robert Hetu
                                                  ---------------------------
                                            Title: DIRECTOR
                                                   --------------------------

                                        By: /s/ William Lutkins
                                            ---------------------------------
                                            Name: William Lutkins
                                                  ---------------------------
                                            Title: Vice President
                                                   --------------------------

BANK OF AMERICA, N.A.                   IMPERIAL BANK
as Documentation Agent and              as Managing Agent, or Issuing Bank
a Bank                                  and a Bank

By: /s/ Steven K. Ahrenholz                 By: /s/ Dino D'Auria
    ---------------------------------       ---------------------------------
    Name: Steven K. Ahrenholz               Name: Dino D'Auria
    ---------------------------------       ---------------------------------
    Title: Principal                        Title: SVP/Group Manager
           --------------------------              --------------------------

BANK ONE, ARIZONA, N.A.
As a Syndication Agent and a Bank

By: /s/ Robert L. Cummings
    ---------------------------------
    Name: Robert L. Cummings
          ---------------------------
    Title: Vice President
           --------------------------
                                       6
<PAGE>

                                                                       EXHIBIT I

                       FORM OF REAFFIRMATION OF GUARANTY

     THIS REAFFIRMATION OF GUARANTY (this "Reaffirmation"), dated as of
                                           -------------
July ___, 2001, is made by the undersigned [_____] (the "Guarantor"), in favor
                                                         ---------
of Credit Suisse First Boston, a bank organized under the laws of Switzerland,
acting through its New York Branch ("CSFB"), as administrative agent and
                                     ----
collateral agent (the "Agent") for the various Banks (the "Banks") from time to
                       -----                               -----
time party to the Credit Agreement, dated as of August 18, 1999 (as the same has
been amended, restated, supplemented and otherwise modified through the date
hereof (including, without limitation, by the Amended and Restated Credit
Agreement dated as of February 9, 2001 among, inter alios, the Borrower, CSFB,
as Administrative Agent and Collateral Agent, and the Banks (the "Amended and
                                                                  -----------
Restated Credit Agreement")) (the "Agreement"), among, inter alios, Wireless
-------------------------          ---------
Facilities, Inc. (the "Borrower"), CSFB, as Administrative Agent and Collateral
                       --------
Agent and the Banks. Capitalized terms used herein and not otherwise defined
herein shall have the meanings ascribed to such terms in the Credit Agreement.

                              W I T N E S S E T H
                              - - - - - - - - - -

     WHEREAS, the Guarantor has entered into a Guaranty, dated as of [August 21,
2000], for the benefit of the Agent and the Banks (as amended, restated,
supplemented and otherwise modified from time to time (including without
limitation by the Reaffirmation of the Guarantee dated as of February 9, 2000
made between the parties hereto), the "Guaranty");

     WHEREAS, the Borrower, the Agent and the Required Banks propose
simultaneously herewith to enter into that certain First Amendment to the
Amended and Restated Credit Agreement, for the purpose of amending certain
provisions of the Agreement;

     WHEREAS, the execution and delivery of this Reaffirmation is a condition
precedent to the effectiveness of the First Amendment to the Amended and
Restated Credit Agreement; and

     WHEREAS, the Guarantor desires to confirm that the Guaranty remains in full
force and effect;

                                 Exhibit I - 1
<PAGE>

     NOW THEREFORE, in order to induce the Agent and the Banks to enter into the
First Amendment to the Amended and Restated Credit Agreement, the Guarantor
hereby agrees as follows:

     1.   Reaffirmation. The Guarantor hereby acknowledges that it has reviewed
          -------------
the terms and provisions of the First Amendment to the Amended and Restated
Credit Agreement and consents to the amendment of the Credit Agreement pursuant
thereto and in the terms thereof. The Guarantor expressly reaffirms that,
notwithstanding the execution, delivery and effectiveness of the First Amendment
to the Amended and Restated Credit Agreement and any and all other agreements,
documents, certificates and instruments executed and delivered in connection
therewith, the Guaranty shall remain in full force and effect and will continue
to guarantee to the fullest extent possible in accordance with the terms of the
Guaranty, the payment and performance of all of the Guaranteed Obligations (as
such term is defined in the Guaranty) now or hereafter existing under or in
respect of the Credit Agreement.

          Except as expressly amended hereby, the Guaranty and all other
documents, agreements and instruments relating thereto are and shall remain
unmodified and in full force and effect.

     2.   Amended and Restated Security Agreement and Pledge Agreement. (a) The
          ------------------------------------------------------------
Guarantor reconfirms the security interest granted to Collateral Agent pursuant
to Section 2 of the Amended and Restated Security Agreement, and hereby grants
to the Collateral Agent a continuing lien on and security interest in and to all
Collateral as collateral security for the prompt payment and performance in full
when due of the Obligations (as such term is defined in the Amended and Restated
Security Agreement) (whether at stated maturity, by acceleration or otherwise).

          (b)  The Guarantor reconfirms the security interest granted to
Collateral Agent pursuant to Section 3 of the Pledge Agreement dated as of
February 9, 2001, and hereby grants to the Collateral Agent a continuing lien on
and security interest in and to all Collateral as collateral security for the
prompt payment and performance in full when due of the Obligations (as such term
is defined in the Pledge Agreement) (whether at stated maturity, by acceleration
or otherwise).

                                 Exhibit I - 2
<PAGE>

     3.   Governing Law. THIS REAFFIRMATION AND THE OBLIGATIONS OF THE GUARANTOR
          -------------
HEREUNDER SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK (INCLUDING SECTION 5-1401 AND
SECTION 5-1402 OF THE NEW YORK GENERAL OBLIGATIONS LAW), BUT OTHERWISE WITHOUT
REFERENCE TO CONFLICTS OF LAW RULES.

                                 Exhibit I - 3
<PAGE>

          IN WITNESS WHEREOF, the Guarantor has caused this Reaffirmation to be
executed as of day and year first above written.

                                [                              ]

                                By:____________________________
                                   Name:
                                   Title:

                                CREDIT SUISSE FIRST BOSTON
                                as Administrative Agent and Collateral Agent

                                By:____________________________
                                   Name:
                                   Title:

                                By:____________________________
                                   Name:
                                   Title:

                                 Exhibit I - 4

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