Document:

<PAGE>

                                                                EXHIBIT 10.38(e)
                                                                ----------------

                           FIFTH AMENDMENT AGREEMENT
                           -------------------------

     AGREEMENT, dated as of October 15, 1999, among BUTLER SERVICE GROUP, INC.,
a New Jersey corporation, BUTLER INTERNATIONAL, INC., a Maryland corporation,
the "Subsidiaries" signatory hereto, and GENERAL ELECTRIC CAPITAL CORPORATION, a
New York corporation.

                                   Background
                                   ----------

     A.  Capitalized terms not otherwise defined shall have the meanings
ascribed to them in the Amended and Restated Credit Agreement dated as of
November 7, 1997, between Butler Service Group, Inc. and General Electric
Capital Corporation (as amended, modified or supplemented from time to time, the
"Credit Agreement").

     B.  The Borrower has requested that the Lender modify certain of the
financial covenants contained in the Credit Agreement.

     C.  The Lender has agreed to the Borrower's request subject to the terms
and conditions of this Agreement.

                                   Agreement
                                   ---------

     In consideration of the Background, which is incorporated by reference, the
parties, intending to be legally bound, agree as follows:

     3.  Modifications. All the terms and provisions of the Credit Agreement and
         -------------
the other Loan Documents shall remain in full force and effect except as
follows:

          (a) Subsection (a) of Schedule 6.2(r) to the Credit Agreement is
              -------------
     deleted and the following replacement subsection is substituted therefor:

               (a) Maximum Capital Expenditures.  The Parent and its
                   ----------------------------
          Subsidiaries (except Butler UK), on a consolidated basis, shall not
          make Capital Expenditures that exceed in the aggregate the amounts set
          forth below for each Fiscal Year, which amount shall be noncumulative
          from year to year:

                               Maximum Capital
                Fiscal Year    Expenditures
                1997           $4,000,000
                1998           $4,200,000
                1999           $6,000,000
                2000           $6,000,000
                2001           $6,000,000

               (b) Subsection (c) of Schedule 6.2(r) of the Credit Agreement is
                                     ---------------
          deleted and the following replacement subsection is substituted
          therefor:

               (c) Fixed Charge Coverage Ratio.  The Parent and its Subsidiaries
                   ---------------------------
          (except Butler UK), on a consolidated basis, shall have a Fixed Charge
          Coverage Ratio measured at each of the dates set forth below for the
          period of the Fiscal Year to such date (and shall maintain at all
          times during the period from and including such date through but
          excluding the last day of the Fiscal Quarter immediately succeeding
          such date), of not less than the amount set forth opposite such date:

                                                                               1
<PAGE>

                                        Fixed Charge
                Date                    Coverage Ratio
                September 30, 1997      1.2 : 1.0
                December 31, 1997       1.2 : 1.0
                March 31, 1998          1.0 : 1.0
                June 30, 1998           1.1 : 1.0
                September 30, 1998      1.2 : 1.0
                December 31, 1998       1.2 : 1.0
                March 31, 1999          1.0 : 1.0
                June 30, 1999           1.1 : 1.0
                September 30, 1999      1.1 : 1.0
                December 31, 1999       1.1 : 1.0
                March 31, 2000          0.9 : 1.0
                June 30, 2000           1.0 : 1.0
                September 30, 2000      1.1 : 1.0
                December 31, 2000       1.1 : 1.0
                March 31, 2001          0.9 : 1.0
                June 30, 2001           1.0 : 1.0

     4.  Conditions Precedent. The Lender's obligations under this Agreement are
contingent upon the Lender's receipt of the following, all in form, scope and
content acceptable to the Lender in its sole discretion:

          (a) Amendment Agreement.  This Agreement duly executed by the parties
              -------------------
     hereto; and

          (b) Other.  Such other agreements and instruments as the Lender shall
              -----
     require.

     3.  Reaffirmation By Borrower and Guarantors.  The Borrower acknowledges
         ----------------------------------------
and agrees, and reaffirms, that it is legally, validly and enforceably indebted
to the Lender under the Notes without defense, counterclaim or offset, and that
it is legally, validly and enforceably liable to the Lender for all costs and
expenses of collection and attorneys' fees related to or in any way arising out
of this Agreement, the Credit Agreement, the Notes and the other Loan Documents.
The Borrower and the Guarantors hereby restate and agree to be bound by all
covenants contained in the Credit Agreement and the other Loan Documents and
hereby reaffirm that all of the representations and warranties contained in the
Credit Agreement and the other Loan Documents remain true and correct in all
material respects. The Borrower and the Guarantors represent that except as set
forth in the Credit Agreement, there are not pending or to the Borrower's and
the Guarantors' knowledge threatened, legal proceedings to which the Borrower or
any of the Guarantors is a party, or which materially or adversely affect the
transactions contemplated by this Agreement or the ability of the Borrower or
any of the Guarantors to conduct its business. The Borrower and the Guarantors
acknowledge and represent that the resolutions of the Borrower and the
Guarantors, dated on or about November 7, 1997, remain in full force and effect
and have not been amended, modified, rescinded or otherwise abrogated.

     4.  Reaffirmation by Guarantors.  Each of the Guarantors acknowledges that
         ---------------------------
each is legally and validly indebted to the Lender under the Guaranty of each
without defense, counterclaim or offset. Each of the Guarantors affirms that the
Guaranty of each remains in full force and effect and acknowledges that the
Guaranty of each encompasses, without limitation, the Obligations, as modified
herein.

                                                                               2
<PAGE>

     5.  Reaffirmation of Collateral.  The Borrower and the Guarantors reaffirm
         ---------------------------
the liens, security interests and pledges granted pursuant to the Loan Documents
to secure the obligations of each thereunder.

     6.  Other Representations By Borrower and Guarantors.  The Borrower and
         ------------------------------------------------
each Guarantor represents and confirms that (a) no Default or Event of Default
has occurred and is continuing and the Lender has not given its consent to or
waived any Default or Event of Default and (b) the Credit Agreement and the
other Loan Documents are in full force and effect and enforceable against the
Borrower and each Guarantor in accordance with the terms thereof. The Borrower
and each Guarantor represents and confirms that as of the date hereof, each has
no claim or defense (and the Borrower and each Guarantor hereby waives every
claim and defense) against the Lender arising out of or relating to the Credit
Agreement and the other Loan Documents or the making, administration or
enforcement of the Loans and the remedies provided for under the Loan Documents.

     7.  No Waiver By Lender.  The Borrower and each Guarantor acknowledges that
         -------------------
(a) by the execution by each of this Agreement, the Lender is not waiving any
Default, whether now existing or hereafter occurring, disclosed or undisclosed,
by the Borrower under the Loan Documents and (b) the Lender reserves all rights
and remedies available to it under the Loan Documents and otherwise.

The parties have executed this Agreement as of the date first above written.

                                    Borrower:
                                    --------

                                    BUTLER SERVICE GROUP, INC.

                                    By  /s/ Michael C. Hellriegel
                                        -------------------------
                                            Michael C. Hellriegel
                                    Title:  SeniorVice President - Finance

                                    Parent:

                                    BUTLER INTERNATIONAL, INC.

                                    By  /s/ Michael C. Hellriegel
                                        -------------------------
                                            Michael C. Hellriegel
                                    Title:  Senior Vice President - Finance

                                    Subsidiaries:
                                    ------------

                                    BUTLER TECHNOLOGY SOLUTIONS, INC.

                                    By  /s/ Michael C. Hellriegel
                                        -------------------------
                                    Name:   Michael C. Hellriegel
                                    Title:  Senior Vice President and Chief
                                            Financial Officer

                                    BUTLER TELECOM, INC.

                                    By  /s/ Michael C. Hellriegel
                                        -------------------------
                                    Name:   Michael C. Hellriegel
                                    Title:  Senior Vice President and Chief
                                            Financial Officer

                                    BUTLER SERVICES, INC.

                                    By  /s/ Michael C. Hellriegel
                                       --------------------------
                                    Name:   Michael C. Hellriegel
                                    Title:  Senior Vice President and Chief
                                            Financial Officer

                                    BUTLER UTILITY SERVICE, INC.

                                                                               3
<PAGE>

                                    By  /s/ Michael C. Hellriegel
                                        -------------------------
                                    Name: Michael C. Hellriegel
                                    Title: Senior Vice President and Chief
                                    Financial Officer

                                    Lender:

                                    GENERAL ELECTRIC CAPITAL CORPORATION

                                    By  /s/ Martin Greenberg
                                        --------------------
                                    Name:  Martin Greenberg
                                    Title: Duly Authorized Signatory

                                                                               4<PAGE>

                                                                EXHIBIT 10.38(f)
                                                                ----------------

                           SIXTH AMENDMENT AGREEMENT
                           -------------------------

     AGREEMENT, dated as of November 17, 1999, among BUTLER SERVICE GROUP, INC.,
a New Jersey corporation, BUTLER INTERNATIONAL, INC., a Maryland corporation,
the "Subsidiaries" signatory hereto, and GENERAL ELECTRIC CAPITAL CORPORATION, a
New York corporation.

                                    Backround
                                    ---------

     A0.  Capitalized terms not otherwise defined shall have the meanings
ascribed to them in the Amended and Restated Credit Agreement dated as of
November 7, 1997, between Butler Service Group, Inc. and General Electric
Capital Corporation (as amended, modified or supplemented from time to time, the
"Credit Agreement").

     B0.  Borrower, through its wholly-owned subsidiary, Butler Telecom, Inc.
("Telecom"), indirectly made the following Permitted Acquisition (the "ISL
Acquisition"):  Pursuant to the Asset Purchase Agreement (the "ISL Purchase
Agreement") dated as of July 26, 1998, among Telecom, ISL International, Inc.
("ISL"), and Mervyn Haft ("Mr. Haft"), Telecom purchased certain assets used in
ISL's business.  Pursuant to the Employment Agreement dated August 3, 1998,
between Telecom and Mr. Haft (the "Haft Employment Agreement"), Telecom agreed
to employ Mr. Haft as Vice President of Butler Technology Solutions, Inc.  Under
the terms of the ISL Purchase Agreement, ISL and Mr. Haft agreed to refrain from
certain activities and Telecom agreed to pay certain amounts based on the future
performance of the acquired assets of ISL, as more fully set forth in the ISL
Purchase Agreement.  Pursuant to the ISL Settlement Agreement dated October 25,
1999 among Mr. Haft, ISL and Telecom (the "ISL Settlement Agreement"), the
parties agreed to terminate the employment relationship evidenced by the Haft
Employment Agreement and accelerate certain payments and extinguish certain
obligations under the ISL Purchase Agreement and Telecom agreed to pay to ISL
the amount of $4,500,000 (payable 75% in cash and 25% in the form of common
stock of Parent) (the "ISL Settlement Amount"), all as more fully set forth in
the ISL Settlement Agreement.

     C0.  The Borrower has requested that the Lender consent to payment of the
ISL Settlement Amount and allow the ISL Settlement Amount to be included within
the amount of the Acquisition Loan Advance made by Lender to Borrower in
connection with the ISL Acquisition and modify the amortization schedule of the
Acquisition Loan Advance made in connection with the ISL Acquisition to include
the ISL Settlement Amount.

     D0.  The Lender has agreed to the Borrower's request subject to the terms
and conditions of this Agreement.
Agreement
In consideration of the Background, which is incorporated by reference, the
parties, intending to be legally bound, agree as follows:

     1 .  Modifications.  Notwithstanding anything to the contrary contained in
          -------------
the Credit Agreement and the other Loan Documents, the Lender hereby (a )
consents to the payment by the Borrower (or Telecom) of the ISL Settlement
Amount as set forth in the ISL Settlement Agreement, (b ) agrees that the ISL
Settlement Amount shall be added to the amount of the Acquisition Loan Advance
extended by the Lender in connection with the ISL Acquisition, and (c ) agrees
that the Borrower shall, subsequent to the date hereof, repay the principal
amount of such Acquisition Loan Advance, as increased by the amount of the ISL
Settlement Amount as follows:

           Payment Date                                             Amount
           ------------                                             ------
(i)        The first day of each Fiscal Quarter commencing          $  372,144
           January 1, 2000, through and including April 1,
           2002
(ii)       July 1, 2002                                             $5,852,844

                                                                               1
<PAGE>

     2 .  Acknowledgment of Debt.  The Borrower acknowledges that after giving
          ----------------------
effect to the payment of the ISL Settlement Amount, the balance of the
Acquisition Loan Advance in respect of the ISL Acquisition is, as of the date of
this Agreement, $9,574,284 and the Borrower agrees to repay the outstanding
principal amount of such Acquisition Loan Advance in accordance with Section 1
above.

     3 .  Conditions Precedent. The Lender's obligations under this Agreement
          --------------------
are contingent upon the Lender's receipt of the following, all in form, scope
and content acceptable to the Lender in its sole discretion:

          (a)  Amendment Agreement.  This Agreement duly executed by the parties
               -------------------
     hereto; and
          (b)  Other.  Such other agreements and instruments as the Lender shall
               -----
     require.

     4 .  Reaffirmation By Borrower.  The Borrower acknowledges and agrees, and
          -------------------------
reaffirms, that it is legally, validly and enforceably indebted to the Lender
under the Notes without defense, counterclaim or offset, and that it is legally,
validly and enforceably liable to the Lender for all costs and expenses of
collection and attorneys' fees related to or in any way arising out of this
Agreement, the Credit Agreement, the Notes and the other Loan Documents. The
Borrower hereby restates and agrees to be bound by all covenants contained in
the Credit Agreement and the other Loan Documents and hereby reaffirms that all
of the representations and warranties contained in the Credit Agreement remain
true and correct in all material respects. The Borrower represents that except
as set forth in the Credit Agreement, there are not pending or to the Borrower's
knowledge threatened, legal proceedings to which the Borrower or any of the
Guarantors is a party, or which materially or adversely affect the transactions
contemplated by this Agreement or the ability of the Borrower or any of the
Guarantors to conduct its business. The Borrower acknowledges and represents
that the resolutions of the Borrower dated on or about November 7, 1997, remain
in full force and effect and have not been amended, modified, rescinded or
otherwise abrogated.

     5 .  Reaffirmation by Guarantors.  Each of the Guarantors acknowledges that
          ---------------------------
each is legally and validly indebted to the Lender under the Guaranty of each
without defense, counterclaim or offset. Each of the Guarantors affirms that the
Guaranty of each remains in full force and effect and acknowledges that the
Guaranty of each encompasses, without limitation, the Obligations, as modified
herein.

     6 .  Reaffirmation of Collateral.  The Borrower and each of the Guarantors
          ---------------------------
reaffirms the liens, security interests and pledges granted pursuant to the Loan
Documents to secure the obligations of each thereunder.

     7 .  Other Representations By Borrower and Guarantors.  The Borrower and
          ------------------------------------------------
each Guarantor represents and confirms that (a) no Default or Event of Default
has occurred and is continuing and the Lender has not given its consent to or
waived any Default or Event of Default and (b) the Credit Agreement and the
other Loan Documents are in full force and effect and enforceable against the
Borrower and each Guarantor in accordance with the terms thereof. The Borrower
and each Guarantor represents and confirms that as of the date hereof, each has
no claim or defense (and the Borrower and each Guarantor hereby waives every
claim and defense) against the Lender arising out of or relating to the Credit
Agreement and the other Loan Documents or the making, administration or
enforcement of the Loans and the remedies provided for under the Loan Documents.

     8 .  No Waiver By Lender.  The Borrower and each Guarantor acknowledges
          -------------------
that (a) by the execution by each of this Agreement, the Lender is not waiving
any Default, whether now existing or hereafter occurring, disclosed or
undisclosed, by the Borrower under the Loan Documents and (b) the Lender
reserves all rights and remedies available to it under the Loan Documents and
otherwise.

                                                                               2
<PAGE>

The parties have executed this Agreement as of the date first above written.

                                      Borrower:
                                      --------

                                      BUTLER SERVICE GROUP, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                              Michael C. Hellriegel
                                      Title:  SeniorVice President - Finance

                                      Parent:
                                      ------

                                      BUTLER INTERNATIONAL, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                              Michael C. Hellriegel
                                      Title:  Senior Vice President - Finance

                                      Subsidiaries:
                                      ------------

                                      BUTLER TECHNOLOGY SOLUTIONS, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                             Michael C. Hellriegel
                                      Title: Senior Vice President and Chief
                                             Financial Officer

                                      BUTLER TELECOM, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                      Name:   Michael C. Hellriegel
                                      Title:  Senior Vice President and Chief
                                              Financial Officer

                                      BUTLER SERVICES, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                      Name:   Michael C. Hellriegel
                                      Title:  Senior Vice President and Chief
                                              Financial Officer

                                      BUTLER UTILITY SERVICE, INC.

                                      By  /s/ Michael C. Hellriegel
                                          -------------------------
                                      Name:   Michael C. Hellriegel
                                      Title:  Senior Vice President and Chief
                                              Financial Officer

                                      Lender:
                                      ------

                                      GENERAL ELECTRIC CAPITAL CORPORATION

                                      By  /s/ Martin Greenberg
                                         --------------------
                                      Name:   Martin Greenberg
                                      Title:  Duly Authorized Signatory

                                                                               3

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