Exhibit 10.1

FIRST AMENDMENT TO THE CREDIT AGREEMENT

     This FIRST AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is dated as of
January 30, 2003 and entered into by and among URS CORPORATION, a Delaware
corporation (“Company”), THE FINANCIAL INSTITUTIONS LISTED ON THE SIGNATURE
PAGES HEREOF (“Lenders”) and CREDIT SUISSE FIRST BOSTON, as administrative agent
for Lenders (“Administrative Agent”), and is made with reference to that certain
Credit Agreement dated as of August 22, 2002 (as amended, modified, restated or
otherwise supplemented to the date hereof, the “Credit Agreement”), by and among
Company, Lenders, CREDIT SUISSE FIRST BOSTON, as a Co-Lead Arranger and
Administrative Agent, WELLS FARGO BANK, NATIONAL ASSOCIATION, as a Co-Lead
Arranger and syndication agent for Lenders, and BNP PARIBAS, HARRIS TRUST &
SAVINGS BANK and THE ROYAL BANK OF SCOTLAND PLC, as co-documentation agents for
Lenders. Capitalized terms used herein without definition shall have the same
meanings herein as set forth in the Credit Agreement.

RECITALS

     WHEREAS, Company and Lenders desire to amend the Credit Agreement as more
particularly described below; and

     WHEREAS, no event has occurred and is continuing or will result from the
consummation of the transactions contemplated by this Amendment that would
constitute an Event of Default or a Potential Event of Default:

     NOW, THEREFORE, in consideration of the premises and the agreements,
provisions and covenants herein contained, the parties hereto agree as follows:

     Section 1. AMENDMENTS TO THE CREDIT AGREEMENT

1.1 Amendments to Section 1: Definitions

     A.     Subsection 1.1 of the Credit Agreement is hereby amended by adding
thereto the following definitions in proper alphabetical order:

     “‘Credit Facilities’ means the senior secured credit facilities extended by
Lenders to Company pursuant to the Agreement.”

     “‘First Amendment Effective Date’ means January 30, 2003.”

     “‘First Amendment Period’ means the period commencing on the First
Amendment Effective Date and ending upon the first to occur of (i) receipt by
Administrative Agent of a Compliance Certificate for the Fiscal Year ending
October 31, 2003 reflecting a Consolidated Leverage Ratio less than or equal to
3.90 to 1.00, (ii) receipt by Administrative Agent of a Compliance Certificate
for the Fiscal Quarter ending January 31, 2004 reflecting a Consolidated
Leverage Ratio less than or equal to 3.75 to 1.00, or (iii) receipt by
Administrative Agent of a Compliance Certificate for the Fiscal Quarter ending
April 30, 2004; provided that in the event the Compliance Certificate for the
Fiscal Quarter ending January 31, 2004 reflects a Consolidated Leverage Ratio
greater than 3.75 to 1.00, the First Amendment Period shall be deemed reinstated
for the period commencing on January 31, 2004 and ending on receipt by
Administrative Agent of a Compliance Certificate for the Fiscal Quarter ending
April 30, 2004; provided further, that any action permitted to be taken, or
condition permitted to exist, after the expiration of the First Amendment Period
shall not, in the event of reinstatement of the First Amendment Period and the

 

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restrictions imposed during the First Amendment Period pursuant to the preceding
clause, constitute an Event of Default or a Potential Event of Default.”

     “‘Fiscal Month’ means a fiscal month of any Fiscal Year.”

1.2 Amendments to Section 2: Amounts and Terms of Commitments and Loans

     A.     Subsection 2.2A of the Credit Agreement is hereby amended by (i)
deleting the proviso at the conclusion of subsection (i) thereof in its entirety
and substituting the following therefor, and (ii) deleting the proviso at the
conclusion of subsection (ii) thereof in its entirety and substituting the
following therefor, respectively:

       “provided further, that, during the First Amendment Period, the Base Rate
Margin and Eurodollar Rate Margin for Tranche A Term Loans and Revolving Loans
shall be 0.25% per annum in excess of the applicable Base Rate Margin and
Eurodollar Rate Margin set forth in the table above, respectively; provided
still further, in the event the senior secured rating for the Credit Facilities
shall, at any time that the Consolidated Leverage Ratio is greater than 3.70 to
1.00, be below BB- from S&P or below Ba3 from Moody’s, the Base Rate Margin and
Eurodollar Rate Margin for Tranche A Term Loans and Revolving Loans shall be
0.25% per annum in excess of the Base Rate Margin and Eurodollar Rate Margin
otherwise applicable pursuant to this subsection 2.2A(i) until the earlier to
occur of (A) the Credit Facilities have achieved a senior secured rating of at
least BB- from S&P and at least Ba3 from Moody’s, or (B) the Consolidated
Leverage Ratio is less than or equal to 3.70 to 1.00 as reflected in a
Compliance Certificate received by Administrative Agent.”          “provided
further, that, during the First Amendment Period, the Base Rate Margin and
Eurodollar Rate Margin for Tranche B Term Loans shall be 0.25% per annum in
excess of the applicable Base Rate Margin and Eurodollar Rate Margin set forth
in the table above, respectively; provided still further, in the event the
senior secured rating for the Credit Facilities shall, at any time that the
Consolidated Leverage Ratio is greater than 3.70 to 1.00, be below BB- from S&P
or below Ba3 from Moody’s, the Base Rate Margin and Eurodollar Rate Margin for
Tranche B Term Loans shall be 0.25% per annum in excess of the Base Rate Margin
and Eurodollar Rate Margin otherwise applicable pursuant to this subsection
2.2A(ii) until the earlier to occur of (A) the Credit Facilities have achieved a
senior secured rating of at least BB- from S&P and at least Ba3 from Moody’s, or
(B) the Consolidated Leverage Ratio is less than or equal to 3.70 to 1.00 as
reflected in a Compliance Certificate received by Administrative Agent.”

     B.     Subsection 2.4B(iii) of the Credit Agreement is hereby amended by
deleting subsection (e) thereof in its entirety and substituting the following
therefor:

       “(e) Prepayments and Reductions from Consolidated Excess Cash Flow.
(1) In the event that there shall be Consolidated Excess Cash Flow for the two
Fiscal Quarter Period ending April 30, 2003, Company shall, no later than
June 25, 2003, prepay the Loans in an aggregate amount equal to 100% of such
Consolidated Excess Flow; (2) in the event that there shall be Consolidated
Excess Cash Flow for the two Fiscal Quarter period ending October 31, 2003,
Company shall, no later than February 10, 2004, prepay the Loans in an aggregate
amount equal to 100% of such Consolidated Excess Flow; and (3) in the event that
there shall be Consolidated Excess Cash Flow for any Fiscal Year commencing with
the Fiscal Year ending October 31, 2004, no later than 100 days after the end of
each Fiscal Year, prepay the Loans in an aggregate amount equal to 75% of such
Consolidated Excess Cash Flow; provided, that commencing with the Fiscal Year
ending October 31, 2004, such percentage shall be reduced to 50% for any Fiscal
Year during which the Consolidated Leverage Ratio as of the last day of such
Fiscal Year is less than 2.50:1.00.”

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1.3 Amendments to Section 6: Company’s Affirmative Covenants

     A.     Subsection 6.1 of the Credit Agreement is hereby amended by deleting
subsection (i) thereof in its entirety and substituting the following therefor:

       “(i) Company Monthly Reports and Quarterly Financials: (a) during the
First Amendment Period, as soon as available and in any event within 30 days
after the end of each Fiscal Month, a consolidated balance sheet of Company and
its Subsidiaries as of the end of such Fiscal Month and the related statements
of income and cash flows of Company and its Subsidiaries (including a
calculation of Consolidated EBITDA) for such Fiscal Month, all in reasonable
detail, (b) as soon as available and in any event within 55 days after the end
of each of the first three Fiscal Quarters of each Fiscal Year, the consolidated
balance sheet of Company and its Subsidiaries as at the end of such Fiscal
Quarter and the related consolidated statements of income and cash flows of
Company and its Subsidiaries for such Fiscal Quarter and for the period from the
beginning of the then current Fiscal Year to the end of such Fiscal Quarter,
setting forth in each case in comparative form the corresponding figures for the
corresponding periods of the previous Fiscal Year, all in reasonable detail and
certified by the chief financial officer of Company that they fairly present, in
all material respects, the financial condition of Company and its Subsidiaries
as at the dates indicated and the results of their operations and their cash
flows for the periods indicated, subject to changes resulting from audit and
normal year-end adjustments, and (c) as soon as available and in any event
within 90 days after the end of each Fiscal Quarter, a summary of such
consolidated statements setting forth in comparative form the corresponding
figures from the Financial Plan for the current Fiscal Year and a narrative
report describing the operations of Company and its Subsidiaries in each case in
the form prepared for presentation to the Governing Body of Company for such
Fiscal Quarter and for the period from the beginning of the then current Fiscal
Year to the end of such Fiscal Quarter;”

1.4 Amendments to Section 7: Company’s Negative Covenants

     A.     Subsection 7.1 of the Credit Agreement is hereby amended by (i)
deleting subsection (x) thereof in its entirety and substituting the following
therefor, and (ii) deleting subsection (xiii) thereof in its entirety and
substituting the following therefor, respectively:

     “(x) Foreign Subsidiaries may become and remain liable with respect to
Indebtedness to Persons other than Company or any of its Subsidiaries in an
aggregate principal amount (including the amount of any such Indebtedness listed
on Schedule 7.1 of the Company Disclosure Letter) not to exceed (a) during the
First Amendment Period, $25,000,000 at any time outstanding, and (b) from and
after the expiration of the First Amendment Period, $40,000,000 at any time
outstanding; provided that such amount shall be increased by 5% as of the last
day of each Fiscal Year, commencing with the Fiscal Year ending on or after the
expiration of the First Amendment Period;”

     “(xiii) Company and its Domestic Subsidiaries (other than Inactive
Subsidiaries) may become and remain liable with respect to other Indebtedness to
Persons other than Company or any of its Subsidiaries in an aggregate principal
amount not to exceed (a) during the First Amendment Period, $5,000,000 at any
time outstanding, and (b) from and after the expiration of the First Amendment
Period, $25,000,000 at any time outstanding; provided that such amount shall be
increased by 10% as of the last day of each Fiscal Year, commencing with the
Fiscal Year ending on or after the expiration of the First Amendment Period.”

     B.     Subsection 7.3 of the Credit Agreement is hereby amended by
inserting the following paragraph at the conclusion thereof:

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     “Notwithstanding anything to the contrary in this subsection 7.3, during
the First Amendment Period, Investments comprised of Cash or Cash Equivalents
(excluding Investments in respect of Joint Venture expenditures relating to EG&G
working capital) otherwise permitted pursuant to subsections (ix) through
(xiii) above shall not exceed an aggregate amount of $5,000,000.”

     C.     Subsection 7.5A of the Credit Agreement is hereby amended by
deleting subsections (x) through (xi) thereof in their entirety and substituting
the following therefor:

     “(x) Company may purchase shares of Capital Stock of Company and any
warrants or other rights with respect to the Capital Stock of Company from
(a) its employees, by net exercise or otherwise, pursuant to the terms of any
employee stock option, restricted stock or incentive stock plan, and (b) its
officers and directors, in an aggregate amount not to exceed $2,000,000 in any
Fiscal Year; and (xi) from and after the expiration of the First Amendment
Period, so long as no Event of Default or Potential Event of Default shall have
occurred and be continuing, Company may repurchase common stock of Company in an
aggregate amount not to exceed $25,000,000, provided that after giving effect to
any such repurchase, (a) Company and its Subsidiaries have sufficient Cash
available, consistent with past practices, for their ordinary business
operations and (b) there are no Swing Line Loans or Revolving Loans
outstanding.”

     D.     Subsection 7.6 of the Credit Agreement is hereby amended by deleting
subsection (B) therefrom in its entirety and substituting the following
therefor:

     “B. Maximum Consolidated Leverage Ratio. Company shall not permit the
Consolidated Leverage Ratio as of the last day of any Fiscal Quarter ending
during any of the periods set forth below to exceed the correlative ratio
indicated:

          Period   Maximum Consolidated Leverage Ratio

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Closing Date through July 31, 2003
    4.50:1.00  
August 1, 2003 through October 31, 2003
    4.25:1.00  
November 1, 2003 through January 31, 2004
    4.00:1.00  
February 1, 2004 through July 31, 2004
    3.75:1.00  
August 1, 2004 through October 31, 2004
    3.60:1.00  
November 1, 2004 through April 30, 2005
    3.50:1.00  
May 1, 2005 through October 31, 2005
    3.25:1.00  
November 1, 2005 and thereafter
    3.00:1.00 ”

     E.     Section 7 of the Credit Agreement is hereby amended by deleting
subsection 7.8 therefrom in its entirety and substituting the following
therefor:

       7.8 Consolidated Capital Expenditures.

       Company shall not, and shall not permit its Subsidiaries to, make or
incur Consolidated Capital Expenditures, in any Fiscal Year indicated below, in
an aggregate amount in excess of the corresponding amount (the “Maximum
Consolidated Capital Expenditures Amount”) set forth below opposite such Fiscal
Year; provided that the Maximum Consolidated Capital Expenditures Amount for any
Fiscal Year commencing with the Fiscal Year ending October 31, 2004 shall be
increased by an amount equal to 100% of the excess, if any, of the Maximum
Consolidated Capital Expenditures Amount for the previous Fiscal Year (without
giving effect to any adjustment in accordance with this proviso) over the actual
amount of Consolidated Capital Expenditures for such previous Fiscal Year:

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              Maximum Consolidated Fiscal Year   Capital Expenditures Amount

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2002
  $ 70,000,000  
2003
  $ 30,000,000  
2004 and each Fiscal Year thereafter
  $ 50,000,000  

     Section 2. CONDITIONS TO EFFECTIVENESS

     Section 1 of this Amendment shall become effective only upon the
satisfaction of all of the following conditions precedent (the date of
satisfaction of such conditions being referred to herein as the “First Amendment
Effective Date”):

     A.     On or before the First Amendment Effective Date, Company shall
deliver to Lenders (or to Administrative Agent for Lenders) the following, each,
unless otherwise noted, dated the First Amendment Effective Date:

  1.   Certified copies of its Certificate of Incorporation, together with a
good standing certificate from the Secretary of State of the State of Delaware,
each dated a recent date prior to the First Amendment Effective Date;     2.   A
certificate, dated as of the First Amendment Effective Date, of its corporate
secretary or an assistant secretary, certifying that there have been no changes
in its Bylaws from the form of Bylaws previously delivered to Lenders;     3.  
Resolutions of its Board of Directors approving and authorizing the execution,
delivery, and performance of this Amendment, certified as of the First Amendment
Effective Date by its corporate secretary or an assistant secretary as being in
full force and effect without modification or amendment;     4.   Signature and
incumbency certificates of its officers executing this Amendment; and     5.  
Executed copies of this Amendment.

     B.     On or before the First Amendment Effective Date, all corporate and
other proceedings taken or to be taken in connection with the transactions
contemplated hereby shall be satisfactory in form and substance to
Administrative Agent and such counsel, and Administrative Agent and such counsel
shall have received all such counterpart originals or certified copies of such
documents as Administrative Agent may reasonably request.

     C. Company shall pay to each Lender executing this Amendment by 5:00 p.m.,
New York time, on February 6, 2003 an amendment fee equal to 0.25% of the sum of
such Lender’s Tranche A Term Loan Exposure plus such Lender’s Tranche B Term
Loan Exposure plus such Lender’s Revolving Loan Exposure.

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     Section 3. COMPANY’S REPRESENTATIONS AND WARRANTIES

     In order to induce Lenders to enter into this Amendment and to amend the
Credit Agreement in the manner provided herein, Company represents and warrants
to each Lender that the following statements are true, correct and complete as
of the First Amendment Effective Date:

     A.     Corporate Power and Authority. Company has all requisite corporate
power and authority to enter into this Amendment and to carry out the
transactions contemplated by, and perform its obligations under, the Credit
Agreement as amended by this Amendment (the “Amended Agreement”).

     B.     Authorization of Agreements. The execution and delivery of this
Amendment and the performance of the Amended Agreement have been duly authorized
by all necessary corporate action on the part of Company.

     C.     No Conflict. The execution and delivery by Company of this Amendment
and the performance by Company of the Amended Agreement do not and will not (i)
violate any provision of any law or any governmental rule or regulation
applicable to Company or any of its Subsidiaries, the Certificate or Articles of
Incorporation or Bylaws of Company or any of its Subsidiaries or any order,
judgment or decree of any court or other agency of government binding on Company
or any of its Subsidiaries, (ii) conflict with, result in a breach of or
constitute (with due notice or lapse of time or both) a default under any
Contractual Obligation of Company or any of its Subsidiaries in any manner that
would be likely to result in a Material Adverse Effect, (iii) result in or
require the creation or imposition of any Lien upon any of the properties or
assets of Company or any of its Subsidiaries (other than Liens created under any
of the Loan Documents in favor of Administrative Agent on behalf of Lenders or
Permitted Encumbrances), or (iv) require any approval of stockholders or any
approval or consent of any Person under any Contractual Obligation of Company or
any of its Subsidiaries.

     D.     Governmental Consents. The execution and delivery by Company of this
Amendment and the performance by Company of the Amended Agreement do not and
will not require any registration with, consent or approval of, or notice to, or
other action to, with or by, any federal, state or other governmental authority
or regulatory body.

     E.     Binding Obligation. This Amendment has been duly executed and
delivered by Company and this Amendment and the Amended Agreement are the
legally valid and binding obligations of Company, enforceable against Company in
accordance with their respective terms, except as may be limited by bankruptcy,
insolvency, reorganization, moratorium or similar laws relating to or limiting
creditors’ rights generally or by equitable principles relating to
enforceability.

     F.     Incorporation of Representations and Warranties From Credit
Agreement. The representations and warranties contained in Section 5 of the
Credit Agreement are and will be true, correct and complete in all material
respects on and as of the First Amendment Effective Date to the same extent as
though made on and as of that date, except to the extent such representations
and warranties specifically relate to an earlier date, in which case they were
true, correct and complete in all material respects on and as of such earlier
date.

     G.     Absence of Default. No event has occurred and is continuing or will
result from the consummation of the transactions contemplated by this Amendment
that would constitute an Event of Default or a Potential Event of Default.

     Section 4. MISCELLANEOUS

       A.      Reference to and Effect on the Credit Agreement and the Other
Loan Documents.

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  (i) On and after the First Amendment Effective Date, each reference in the
Credit Agreement to “this Agreement”, “hereunder”, “hereof”, “herein” or words
of like import referring to the Credit Agreement, and each reference in the
other Loan Documents to the “Credit Agreement”, “thereunder”, “thereof” or words
of like import referring to the Credit Agreement shall mean and be a reference
to the Amended Agreement.     (ii) Except as specifically amended by this
Amendment, the Credit Agreement and the other Loan Documents shall remain in
full force and effect and are hereby ratified and confirmed.     (iii) The
execution, delivery and performance of this Amendment shall not, except as
expressly provided herein, constitute a waiver of any provision of, or operate
as a waiver of any right, power or remedy of Administrative Agent or any Lender
under, the Credit Agreement or any of the other Loan Documents.

     B.     Fees and Expenses. Company acknowledges that all costs, fees and
expenses as described in subsection 10.2 of the Credit Agreement incurred by
Administrative Agent and its counsel with respect to this Amendment and the
documents and transactions contemplated hereby shall be for the account of
Company.

     C.     Headings. Section and subsection headings in this Amendment are
included herein for convenience of reference only and shall not constitute a
part of this Amendment for any other purpose or be given any substantive effect.

     D.     Applicable Law. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN
ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK (INCLUDING WITHOUT
LIMITATION SECTION 5-1401 OF THE GENERAL OBLIGATIONS LAW OF THE STATE OF NEW
YORK), WITHOUT REGARD TO CONFLICTS OF LAWS PRINCIPLES.

     E.     Counterparts; Effectiveness. This Amendment may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which when so executed and delivered shall be deemed an original, but
all such counterparts together shall constitute but one and the same instrument;
signature pages may be detached from multiple separate counterparts and attached
to a single counterpart so that all signature pages are physically attached to
the same document. This Amendment (other than the provisions of Section 1
hereof, the effectiveness of which is governed by Section 2 hereof) shall become
effective upon the execution of a counterpart hereof by Company, Requisite
Lenders and each of the Subsidiary Guarantors and receipt by Company and
Administrative Agent of written or telephonic notification of such execution and
authorization of delivery thereof.

     Section 5. ACKNOWLEDGEMENT AND CONSENT BY GUARANTORS

     Each guarantor listed on the signature pages hereof (“Subsidiary
Guarantors”) hereby acknowledges that it has read this Amendment and consents to
the terms thereof, and hereby confirms and agrees that, notwithstanding the
effectiveness of this Amendment, the obligations of each Subsidiary Guarantor
under its applicable Subsidiary Guaranty shall not be impaired or affected and
the applicable Subsidiary Guaranty is, and shall continue to be, in full force
and effect and is hereby confirmed and ratified in all respects. Each Subsidiary
Guarantor further agrees that nothing in the Credit Agreement, this Amendment or
any other Loan Document shall be deemed to require the consent of such
Subsidiary Guarantor to any future amendment to the Credit Agreement.

[The remainder of page intentionally left blank.]

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     IN WITNESS WHEREOF, the Company, Lenders, and Guarantors have caused this
Amendment to be duly executed and delivered by their respective officers
thereunto duly authorized as of the date first written above.

              URS CORPORATION, a Delaware
corporation               By:   /s/ Kent P. Ainsworth        

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    Name:
Title:   Kent P. Ainsworth
Executive Vice
President and Chief
Financial Officer               AURUM CLO 2002-1 LTD.               By: Stein
Roe & Farnham Incorporated, as
Investment Manager               By:   /s/ Kathleen A. Zam        

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    Name:
Title:   Kathleen A. Zam
Senior Vice President               STEIN ROE & FARNHAM CLO I LTD.              
By: Stein Roe & Farnham Incorporated, as
Portfolio Manager               By:   /s/ Kathleen A. Zam        

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    Name:
Title:   Kathleen A. Zam
Senior Vice President               STEIN ROE FLOATING RATE
LIMITED LIABILITY COMPANY               By: Stein Roe & Farnham Incorporated, as
Advisor               By:   /s/ Kathleen A. Zam        

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    Name:
Title:   Kathleen A. Zam
Senior Vice President               DENALI CAPITAL LLC, managing member
of DC Funding Partners, portfolio manager for
DENALI CAPITAL CLO III, LTD. or an
affiliate               By:   /s/ John P. Thacker        

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    Name:
Title:   John P. Thacker
Chief Credit Officer

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              DENALI CAPITAL LLC, managing member
of DC Funding Partners, portfolio manager for
DENALI CAPITAL CLO II, LTD. or an
affiliate               By:   /s/ John P. Thacker        

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    Name:
Title:   John P. Thacker
Chief Credit Officer               DENALI CAPITAL LLC, managing member of
DC Funding Partners, portfolio manager for
DENALI CAPITAL CLO I, LTD. or an
affiliate               By:   /s/ John P. Thacker        

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    Name:
Title:   John P. Thacker
Chief Credit Officer               THE ROYAL BANK OF SCOTLAND
PLC, Individually and as a Co-Documentation
Agent               By:   /s/ Andrew S. Weinberg        

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    Name:
Title:   Andrew S. Weinberg
Senior Vice President               WHITNEY PRIVATE DEBT FUND, L.P.            
  By:   /s/ Marc S. Diagonale        

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    Name:
Title:   Marc S. Diagonale
Authorized Signatory               ORIX FINANCIAL SERVICES, INC.              
By:   /s/        

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    Title:   Vice President               METROPOLITAN LIFE INSURANCE COMPANY  
            By:   /s/        

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    Title:   Director

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              MADISON AVENUE CDO IV LTD.
By: Metropolitan Life Insurance Company, as
Collateral Manager               By:   /s/        

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    Title:   Director               VENTURE II CDO 2002, LIMITED
By its investment advisor, Barclays Bank PLC,
New York Branch               By:   /s/ Kenneth Ostmann        

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    Name:
Title:   Kenneth Ostmann
Director               VENTURE CDO 2002, LIMITED
By its investment advisor, Barclays Capital
Asset Management, Limited               By its sub-advisor, Barclays Bank PLC,
New
York Branch               By:   /s/ Kenneth Ostmann        

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    Name:
Title:   Kenneth Ostmann
Director               PROMETHEUS INVESTMENT FUNDING
NO. 2, LTD               By:   /s/ Elizabeth Tallmadge        

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    Name:
Title:   Elizabeth Tallmadge
Managing Director and Chief
Investment Officer               By:   /s/ James T. Li        

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    Name:
Title:   James T. Li
Associate Director               PROMETHEUS INVESTMENT FUNDING
NO. 1, LTD               By:   /s/ Elizabeth Tallmadge        

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    Name:
Title:   Elizabeth Tallmadge
Managing Director and Chief
Investment Officer               By:   /s/ James T. Li        

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    Name:
Title:   James T. Li
Associate Director

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              MAPLEWOO (CAYMAN) LIMITED
By: David L. Babson & Company Inc. under
delegated authority from Massachusetts
Mutual Life Insurance Company as Investment
Manager               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               TRYON CLO LTD 2000-I
By: David L. Babson & Company Inc.
as Collateral Manager               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               SUFFIELD CLO, LIMITED
By: David L. Babson & Company Inc.
as Collateral Manager               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               ELC (CAYMAN), LTD. 2000-I
By: David L. Babson & Company Inc. as
Collateral Manager
              By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director
              ELC (CAYMAN), LTD. CDO SERIES
1999-1
By: David L. Babson & Company Inc. as
Collateral Manager               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director

11

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              BILL & MELINDA GATES FOUNDATION
By: David L. Babson & Company Inc.
as Investment Advisor               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               APEX (IDM) CDO I, LTD.
By: David L. Babson & Company Inc. as
Collateral Manager               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               MASSACHUSETTS MUTUAL LIFE INSURANCE
COMPANY
By: David L. Babson & Company Inc.
as Investment Adviser               By:   /s/ Glenn Duffy        

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    Name:
Title:   Glenn Duffy
Managing Director               NATIONAL CITY BANK               By:   /s/      
 

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    Title:   Vice President               HARBOURVIEW CLO V, LTD.              
By:   /s/        

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    Title:   Manager               PPM SPYGLASS FUNDING TRUST               By:
  /s/ Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Authorized Agent               PPM SHADOW CREEK FUNDING LLC               By:  
/s/ Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Assistant Vice President

12

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              SRF 2000 LLC               By:   /s/ Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Assistant Vice President               OLYMPIC FUNDING TRUST, SERIES
1999-1               By:   /s/ Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Authorized Agent               MUIRFIELD TRADING LLC               By:   /s/
Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Assistant Vice President               STANWICH LOAN FUNDING LLC              
By:   /s/ Diana L. Mushill        

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    Name:
Title:   Diana L. Mushill
Assistant Vice President               PRINCIPAL LIFE INSURANCE
COMPANY               By:   /s/ Jon C. Heiny        

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    Name:
Title:   Jon C. Heiny
Counsel               By:   /s/ Douglas A. Drees        

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    Name:
Title:   Douglas A. Drees
Counsel               ING CAPITAL LLC               By:   /s/        

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    Title:   Managing Director               LONGHORN CDO (CAYMAN) LTD
By: Merrill Lynch Investment Managers, L.P.,
as Investment Advisor               By:   /s/ Anthony Heyman        

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    Name:
Title:   Anthony Heyman
Authorized Signatory               LONGHORN CDO II, LTD

13

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              By: Merrill Lynch Investment Managers, L.P., As Investment Advisor
              By:   /s/ Anthony Heyman        

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    Name:
Title:   Anthony Heyman
Authorized Signatory               MERRILL LYNCH PRIME RATE
PORTFOLIO
By: Merrill Lynch Investment Managers, L.P.,
As Investment Advisor               By:   /s/ Anthony Heyman        

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    Name:
Title:   Anthony Heyman
Authorized Signatory               MERRILL LYNCH SENIOR FLOATING
RATE FUND, INC.               By:   /s/ Anthony Heyman        

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    Name:
Title:   Anthony Heyman
Authorized Signatory               MERRILL LYNCH GLOBAL
INVESTMENT SERIES: BANK LOAN
INCOME PORTFOLIO
By: Merrill Lynch Investment Managers, L.P.
as Investment Advisors               By:   /s/ Anthony Heyman        

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    Name:
Title:   Anthony Heyman
Authorized Signatory               DRYDEN LEVERAGED LOAN CDO
2002-II
By: Prudential Investment Management, Inc.,
as Collateral Manager               By:   /s/        

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    Title:   Vice President               DRYDEN III-LEVERAGED LOAN CDO 2002
By: Prudential Investment
Management, Inc., as Collateral
Manager               By:   /s/        

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    Title:   Vice President               DRYDEN HIGH YIELD CDO 2001-1

14

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              By: Prudential Investment
management, Inc., as Collateral
Manager               By:   /s/        

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    Title:   Vice President               BNP PARIBAS               By:   /s/
Duane P. Helkowski        

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    Name:
Title:   Duane P. Helkowski
Director               By:   /s/ Stephanie Rogers        

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    Name:
Title:   Stephanie Rogers
Vice President               FRANKLIN CLO IV, LIMITED               By:   /s/
Richard D’Addario        

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    Name:
Title:   Richard D’Addario
Senior Vice President               FRANKLIN CLO III, LIMITED               By:
  /s/ Richard D’Addario        

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    Name:
Title:   Richard D’Addario
Senior Vice President               FRANKLIN CLO II, LIMITED               By:  
/s/ Richard D’Addario        

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    Name:
Title:   Richard D’Addario
Senior Vice President               FRANKLIN CLO I, LIMITED               By:  
/s/ Richard D’Addario        

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    Name:
Title:   Richard D’Addario
Senior Vice President               FRANKLIN FLOATING RATE DAILY ACCESS
FUND               By:   /s/ Richard D’Addario        

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    Name:
Title:   Richard D’Addario
Vice President

15

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              FRANKLIN FLOATING RATE TRUST               By:   /s/ Richard
D’Addario        

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    Name:
Title:   Richard D’Addario
Vice President               BRYN MAWR CLO, LTD
By: Deefield Capital Management LLC
as its Collateral Manager               By:   /s/ Matt Stouffer        

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    Name:
Title:   Matt Stouffer
Vice President               ROSEMONT CLO, LTD
By: Deefield Capital Management LLC
as its Collateral Manager               By:   /s/ Matt Stouffer        

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    Name:
Title:   Matt Stouffer
Vice President               SEQUILS – CUMBERLAND I, LTD
By: Deefield Capital Management LLC
as its Collateral Manager               By:   /s/ Matt Stouffer        

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    Name:
Title:   Matt Stouffer
Vice President               JP MORGAN CHASE BANK, as trustee of
the Antares Funding Trust created
under the Trust Agreement dated as
of November 30, 1999               By:   /s/ Leslie Hundley        

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    Name:
Title:   Leslie Hundley
Officer               ERSTE BANK               By:   /s/ Brandon A. Meyerson    
   

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    Name:
Title:   Brandon A. Meyerson
Vice President, Erste Bank
New York Branch               By:   /s/        

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    Title:   First Vice President

16

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              GENERAL ELECTRIC CAPITAL
CORPORATION               By:   /s/ Janet K. Williams        

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

    Name:
Title:   Janet K. Williams
Duly Authorized Signatory               WELLS FARGO BANK, NATIONAL
ASSOCIATION, Individually and as
Syndication Agent               By:   /s/ Marsha Poenisch        

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    Name:
Title:   Marsha Poenisch
Vice President               TORONTO DOMINION (NEW YORK), INC.               By:
  /s/ Gwen Zirkle        

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    Name:
Title:   Gwen Zirkle
Vice President               UNION BANK OF CALIFORNIA, N.A.               By:  
/s/        

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    Title:   Vice President               CREDIT SUISSE FIRST BOSTON,
Individually and as Administrative
Agent               By:   /s/ Bill O’Daly        

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    Name:
Title:   Bill O’Daly
Director               By:   /s/ Cassandra Droogan        

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    Name:
Title:   Cassandra Droogan
Associate               ANTARES CAPITAL CORPORATION               By:   /s/
David Mahon        

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    Name:
Title:   David Mahon
Director               IKB CAPITAL CORPORATION               By:   /s/ David
Snyder        

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    Name:
Title:   David Snyder
President

17

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              US BANK, NA               By:   /s/ Douglas A. Rich        

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    Name:
Title:   Douglas A. Rich
Vice President               HARRIS TRUST & SAVINGS BANK               By:   /s/
Isabella Battista        

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    Name
Title:   Isabella Battista
Vice President               MARINER CDO 2002, LTD               By:   /s/ David
Mahon        

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    Name:
Title:   David Mahon
Vice President               NOVA CDO 2001, LTD               By:   /s/ David
Mahon        

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    Name:
Title:   David Mahon
Vice President               BANK LEUMI USA               By:   /s/ Aliz Sadan  
     

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    Name:
Title:   Aliz Sadan
Assistant Vice President               MERRILL LYNCH CAPITAL, a division
of Merrill Lynch Business Financial
Services, Inc.               By:   /s/ Julia F. Maslanka        

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    Name:
Title:   Julia f. Maslanka
Vice President               TRANSAMERICA BUSINESS CAPITAL
CORPORATION               By:   /s/ Stephen K. Goetschius        

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    Name:
Title:   Stephen K. Goetschius
Senior Vice President

18

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              AIMCO CDO SERIES 2000-A, as a
Lender               By:   /s/ Chris Goergen        

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    Name:
Title:   Chris Goergen
Authorized Signatory               By:   /s/ Jerry D. Zinkula        

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    Name:
Title:   Jerry D. Zinkula
Authorized Signatory               AIMCO CDO SERIES 2001-A, as a
Lender               By:   /s/ Chris Goergen        

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    Name:
Title:   Chris Goergen
Authorized Signatory               By:   /s/ Jerry D. Zinkula        

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    Name:
Title:   Jerry D. Zinkula
Authorized Signatory               ALLSTATE LIFE INSURANCE COMPANY, as
a Lender               By:   /s/ Chris Goergen        

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    Name:
Title:   Chris Goergen
Authorized Signatory               By:   /s/ Jerry D. Zinkula        

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    Name:
Title:   Jerry D. Zinkula
Authorized Signatory               GUARANTORS:               AMAN ENVIRONMENTAL
CONSTRUCTION,
INC., a California corporation               By:   /s/ Jeffrey M. Kissel        

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    Name:
Title:   Jeffrey M. Kissel
Chief Financial Officer               BANSHEE CONSTRUCTION COMPANY, INC.,
a California corporation               By:   /s/ Michael T. Orear        

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    Name:
Title:   Michael T. Orear
President

19

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              CLEVELAND WRECKING COMPANY, a
California corporation               By:   /s/ James Sheridan        

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    Name:
Title:   James Sheridan
President               O’BRIEN-KREITZBERG INC., a
California corporation               By:   /s/ Jeffrey M. Kissel        

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    Name:
Title:   Jeffrey M. Kissel
Chief Financial Officer and Secretary               RADIAN INTERNATIONAL LLC, a
Delaware limited liability company               By:   /s/ David C. Nelson      
 

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               SIGNET TESTING LABORATORIES INC., a
Delaware corporation               By:   /s/ Jeffrey M. Kissel        

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    Name:
Title:   Jeffrey M. Kissel
President               URS CONSTRUCTION SERVICES, INC., a
Florida corporation               By:   /s/ Kent P. Ainsworth        

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    Name:
Title:   Kent P. Ainsworth
Executive Vice President and
Chief Executive Officer               URS CORPORATION, a Nevada
corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               URS CORPORATION GREAT LAKES, a
Michigan corporation               By:   /s/ Kent P. Ainsworth        

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    Name:
Title:   Kent P. Ainsworth
Executive Vice President and
Chief Financial Officer

20

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              URS CORPORATION GROUP CONSULTANTS,
a New York corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               URS CORPORATION — MARYLAND, a
Maryland corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               URS CORPORATION — OHIO, an Ohio
corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               URS CORPORATION SOUTHERN, a
California corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               URS GROUP, INC., a Delaware
corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Assistant Treasurer               URS OPERATING SERVICES,
INC., a
Delaware corporation               By:   /s/ Peter J. Pedalino        

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    Name:
Title:   Peter J. Pedalino
Vice President and Controller               URS HOLDINGS, INC., a Delaware
corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer

21

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              URS INTERNATIONAL INC., a Delaware
corporation               By:   /s/ David C. Nelson        

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    Name:
Title:   David C. Nelson
Vice President and Treasurer               LEAR SIEGLER SERVICES, INC., a
Delaware corporation               By:   /s/ Kent P. Ainsworth        

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    Name:
Title:   Kent P. Ainsworth
Executive Vice President               EG&G TECHNICAL SERVICES, INC., a
Delaware corporation               By:   /s/ Kent P. Ainsworth        

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    Name:
Title:   Kent P. Ainsworth
Executive Vice President               EG&G DEFENSE MATERIALS, INC., a
Utah corporation               By:   /s/ William Neeb        

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    Name:
Title:   William Neeb
Vice President

22