Document:

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                                                                    EXHIBIT 10.4

                                  AMENDMENT OF
                              EMPLOYMENT AGREEMENT

         WHEREAS, ACSYS, Inc. (the "Company") and Pat Kennedy (the "Executive")
have entered into an employment agreement dated February 7, 2000 (the
"Employment Agreement");

         WHEREAS, the Company, Tiberia B.V. ("Tiberia"), Platform Purchaser Inc.
("Purchaser"), Vedior N.V. and Select Appointments North America Inc. have
entered into an agreement dated April 16, 2000 ((the "Merger Agreement")
providing for the merger of Purchaser with and into the Company with the Company
surviving as a wholly owned subsidiary of Tiberia (the "Merger"), and a
condition of the consummation of the Merger pursuant to the Merger Agreement is
that the Executive enter into this amendment;

         WHEREAS, subject to the terms of the Merger Agreement, Purchaser is to
purchase Shares pursuant to an Offer if the Minimum Tender Condition is
satisfied, and the date on which such purchase occurs is referred to as the
"Tender Date" for purposes of this amendment (as the terms "Shares," "Offer,"
and "Minimum Tender Condition" are defined in the Merger Agreement);

         NOW, THEREFORE, pursuant to Section 13(f) of the Employment Agreement,
IT IS AGREED by and between the parties hereto that, effective as of the Tender
Date, the Employment Agreement is hereby amended in the following particulars;
provided however, that this amendment shall be without effect if the Tender Date
does not occur, or if the Executive's employment with the Company terminates
prior to the Tender Date:

1.       By adding the following sentence after the second sentence of Section
         1(a) of the Employment Agreement:

         "As of the Tender Date (as defined in Section 2(c)) the Executive shall
         have the title of Executive Vice President, IT Division of the
         Company."

2.       By substituting the following for Section 2(b) of the Employment
         Agreement:

                  "(b)     Bonus. Executive shall be eligible to receive bonus
         compensation as hereinafter set forth. The determination of such bonus
         amount and the time of payment of such bonus shall be substantially in
         accordance with the description of the determination of such bonus in
         accordance with Exhibit A to this Agreement (which relates to the bonus
         calculation of certain other employees), which is attached to and forms
         a part of this Agreement. The revenue and EBITDA goals for the year
         2000 shall be as currently set forth in the budget prepared by the
         Company's management for the year 2000. The revenue and EBITDA goals
         for the year 2001 shall be established by the Company's management in
         accordance with historical practices but shall be subject to approval
         by the Company's Board of Directors. In no event shall the annual bonus
         be less than $50,000."

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3.       By adding the following new Section 2(c) to the Employment Agreement:

                  "(c)     Acsys, Inc. ("Acsys"), Tiberia B.V. ("Tiberia"),
         Platform Purchaser Inc. ("Purchaser"), Vedior N.V. and Select
         Appointments North America Inc. have entered into an agreement dated
         April 16, 2000 (the "Merger Agreement") providing for the merger of
         Purchaser with and into Acsys with Acsys surviving as a wholly owned
         subsidiary of Tiberia (the "Merger"). Subject to the terms of the
         Merger Agreement, Purchaser is to purchase Shares pursuant to an Offer
         if the Minimum Tender Condition is satisfied, and the date on which
         such purchase occurs is referred to as the "Tender Date" for purposes
         of this Agreement (as the terms "Shares," "Offer," and "Minimum Tender
         Condition" are defined in the Merger Agreement). As of the Tender Date,
         the Company shall make a lump sum cash payment to the Executive equal
         to $532,013, if the Executive is employed by the Company on that date.
         As soon as practicable after the two-year anniversary of the Tender
         Date, if the Executive is employed by the Company on such two-year
         anniversary, the Executive shall be entitled to a second payment of
         $532,013."

4.       By adding the following new Section 3(d) to the Employment Agreement:

         "The payment to Executive with respect to any Unvested Platform Option
         Value of Platform Options (as the terms "Unvested Platform Option
         Value" and "Platform Options" are defined in the Merger Agreement)
         shall be made as follows: (i) 50% of the Unvested Platform Option Value
         of each Platform Option shall be paid in cash in a lump sum on the
         Effective Time (as the term "Effective Time" is defined in the Merger
         Agreement), and (ii) 50% of the Unvested Platform Option Value of each
         Platform Option shall be paid in cash in a lump sum on the two-year
         anniversary of the Effective Time."

5.       By adding the following at the end of Section 4(a) of the Employment
         Agreement:

         "Termination under this Section 4(a) shall be deemed termination
         without Cause."

6.       By substituting the following for Section 4(b) of the Employment
         Agreement:

                  "(b)     Termination Without Cause, Resignation for Good
         Reason. Company may terminate Executive's employment at any time
         without Cause by providing Executive with written notice of the
         Termination. If the Executive's employment with the Company terminates
         at any time on or after the Tender Date, and prior to the two-year
         anniversary of the Tender Date, and any one of the paragraphs (i), (ii)
         or (iii) below are applicable to the termination, Executive shall be
         entitled to a lump sum severance payment of $532,013 (but only if
         Executive executes a separation agreement including a general release
         and reaffirmation of certain covenants in this Agreement in a form
         acceptable to Company):

                           (i) the Executive resigns for Good Reason;

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                           (ii) the following paragraphs (A), (B), and (C) are
         all applicable to the Executive's termination of employment:

                  (A)      the Executive's employment is terminated for Cause
                           under circumstances described in Section 4(c)(iv)
                           (relating to failure to perform certain duties),
                           Section 4(c)(v) (relating to disability), Section
                           4(c)(viii) (relating to certain other breaches) or
                           Section 4(c)(ix) (relating to termination for failure
                           to meet performance expectations);

                  (B)      none of the other circumstances of "Cause" as
                           described in Section 4.1(c) clauses (i), (ii), (iii),
                           (vi), or (vii) are applicable to the Executive; and

                  (C)      there has not been willful and continued dereliction
                           of duties by the Executive that is not corrected by
                           the Executive within a reasonable period of time
                           after a written demand for corrective action is
                           delivered to the Executive by the Company's Chief
                           Executive Officer; or

                           (iii) the Executive's employment is terminated by the
         Company without Cause."

7.       By deleting the following sentence where it appears in Section 4(c) of
         the Employment Agreement:

         "If Company terminates Executive's employment for Cause pursuant to
         Section 4(c)(ix), Executive shall not be bound by the noncompetition
         restriction in Section 7(c) below."

8.       By deleting paragraphs (i) and (ii) of Section 4(e) of the Employment
         Agreement, and substituting the following for such paragraphs:

                  "(i) a material breach by the Company of any material
         provision of this Agreement; provided, however that a change in the
         Executive's duties, responsibilities, authority, or reporting
         relationships shall not constitute a basis for a "Good Reason"
         termination unless either (I) such change results in assignment to the
         Executive of a position that is at a lower rank than the rank held by
         the Executive immediately prior to the change, or (II) the Executive is
         assigned tasks that would be materially inconsistent with those of the
         position assigned to the Executive, or the Executive, in any material
         respect, fails to be given the authority, power, responsibilities and
         duties as are inherent in the position assigned to the Executive and
         necessary to carry out the Executive's responsibilities and the duties
         of the position; or

                  (ii) relocation of Executive out of the Atlanta area to which
         Executive is currently in the process of locating."

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9.       By substituting the following for Section 4(f) of the Employment
         Agreement:

         "(f)  [RESERVED]"

         IN WITNESS WHEREOF, the parties have agreed to this Amendment of the
Employment Agreement as of this 16th day of April, 2000.

Acsys, Inc.                              Pat Kennedy

By /s/ David C. Cooper                      /s/ Pat Kennedy
  -----------------------                 -------------------

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                                    Exhibit A

                              Acsys Inc. Year 2000
                                   IT Division
                       Field Operations Bonus Calculations

Executive/Group Director:                 Can earn 100% of base salary
         Eligible Employees: Executive Director, J. Joyce, R. Harrison

Regional/Area Director:                   Can earn 50% of base salary
Eligible Employees:

Quarterly Pay out  (50% of the total bonus calculation)

The quarterly bonus, to be paid on April 30, July 31, Oct 31 and Jan 31, will be
based on the following criteria:

         Based on meeting budget goals of
                              Revenue                    Weighted at 50%
                              EBITDA                     Weighted at 30%
         Maintaining 95% of A/R less than 120 days old   Weighted at 20%

Annual Pay Out (50% of the total bonus calculation)

The annual bonus, to be paid on Jan 31, will be based on the following criteria:

         Based on meeting budget goals of
                              Revenue                    Weighted at 50%
                              EBITDA                     Weighted at 50%

<TABLE>
<S>                        <C>      <C>                       <C>               <C>                       <C>
< 105% of budget-0%                 110% of budget-           50%               116% of budget-           80%
105% of budget-            25%      111% of budget-           55%               117% of budget-           85%
106% of budget-            30%      112% of budget-           60%               118% of budget-           90%
107% of budget-            35%      113% of budget-           65%               119% of budget-           95%
108% of budget-            40%      114% of budget-           70%               120% of budget-           100%
109% of budget-            45%      115% of budget-           75%               Discretionary
</TABLE><PAGE>   1

                                                                     EXHIBIT 4.1

                      FOURTH AMENDMENT TO RIGHTS AGREEMENT

         THIS FOURTH AMENDMENT TO RIGHTS AGREEMENT (this "Amendment") is made as
of the 13th day of April, 2000, by and between RAILAMERICA, INC., a Delaware
corporation (the "Company"), and AMERICAN STOCK TRANSFER & TRUST COMPANY (the
"Rights Agent").

                                    RECITALS

         WHEREAS, on January 6, 1998, the Board of Directors of the Company
authorized and declared a dividend distribution of one Right for each share of
common stock, $.001 par value, of the Company outstanding at the close of
business on January 20, 1998; and

         WHEREAS, the Company and the Rights Agent entered into a certain Rights
Agreement, dated as of January 6, 1998, as amended September 3, 1998, April 18,
1999 and January 13, 2000 (the "Rights Agreement"), providing, among other
things, for the issuance of the Rights (all capitalized terms used in this
Amendment and not otherwise defined herein shall have the meanings ascribed to
such terms in the Rights Agreement); and

         WHEREAS, the Board of Directors of the Company has approved the
amendment of the Rights Agreement as hereinafter set forth, pursuant to
resolutions duly adopted at a meeting of the Board of Directors held on April
13, 2000;

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         1. Section 1 of the Rights Agreement is hereby amended by deleting the
definition of "Acquiring Person" set forth in subsection (a) thereof in its
entirety and substituting therefor a new definition of "Acquiring Person" to
read as follows:

                  "Acquiring Person" shall mean any Person who or which,
         together with all Affiliates and Associates of such Person, shall be
         the Beneficial Owner of fifteen percent (15%) or more of the shares of
         Common Stock then outstanding. Notwithstanding the foregoing, the term
         "Acquiring Person" shall not include (i) the Company, any Subsidiary of
         the Company, any employee benefit plan of the Company or of any
         Subsidiary of the Company, or any Person or entity organized, appointed
         or established by the Company for or pursuant to the terms of any such
         plan, (ii) EGS Associates, L.P., a Delaware limited partnership, EGS
         Partners L.L.C., a Delaware limited liability company, Bev Partners,
         L.P., a Delaware limited partnership, Jonas Partners, L.P., a New York
         limited partnership, EGS Management, L.L.C., a Delaware limited
         liability company, William Ehrman,

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         Frederic Greenberg, Jonas Gerstl and Julia Oliver, unless (a) such
         Persons shall be the Beneficial Owners, individually or in the
         aggregate, of more than twenty-five percent (25%) of the shares of
         Common Stock then outstanding, (b) the Agreement, dated August 21,
         1998, between the Company, EGS Associates, L.P., EGS Partners, L.L.C.,
         BEV Partners, L.P., Jonas Partners, L.P., William Ehrman, Frederic
         Greenberg, Frederick Ketcher, Jonas Gerstl, James McLaren and William
         Lautman, as such Agreement may be amended or supplemented from time to
         time, shall be determined to be unenforceable by a court of competent
         jurisdiction or (c) such Persons shall challenge the enforceability of
         such Agreement, (iii) Barclays Bank PLC and the lenders named in that
         certain Senior Secured Loan Facility and Guaranty Agreement (the
         "Facility") dated as of April 30, 1999 among Freight Victoria, the
         Company, RailAmerica Australia Pty Ltd., Barclays Bank PLC and the
         lenders named therein (such lenders collectively with Barclays Bank PLC
         to be referred to hereinafter as the "Lenders"), but only with respect
         to (A) warrants (the "Warrants") to purchase shares of Common Stock
         issued by the Company to the Lenders pursuant to the Facility and
         pursuant to that certain Warrant Agreement dated as of April 30, 1999
         between the Company and the Lenders and (B) the shares of Common Stock
         issuable upon exercise of the Warrants, it being understood that all
         other shares of Common Stock acquired by the Lenders independent of (A)
         or (B) above shall be considered for purposes of determining Acquiring
         Person status of Lenders; or (iv) any Person who or which, together
         with all Affiliates and Associates of such Person, would be an
         Acquiring Person solely by reason of a reduction in the number of
         issued and outstanding shares of Common Stock of the Company pursuant
         to a transaction or series of related transactions approved by a
         majority of the Independent Directors, if any, then in office and
         approved by a Supermajority Vote; provided, further, however, that in
         the event that such Person described in the foregoing clause (iv) does
         not become an Acquiring Person by reason of the foregoing clause (iv),
         such Person shall nonetheless become an Acquiring Person in the event
         such Person thereafter acquires Beneficial Ownership of an additional
         one percent (1%) of the Common Stock of the Company, unless such
         additional Common Stock ownership results solely from a subsequent
         reduction in the number of issued and outstanding shares of Common
         Stock of the Company."

         2. Except as specifically amended hereby, the Rights Agreement is and
remains unmodified and in full force and effect and is hereby ratified and
confirmed.

         3. This Amendment shall be deemed a contract made under the laws of the
State of Delaware and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts made and to be
performed entirely within such State.

         4. This Amendment may be executed in counterparts and both of such
counterparts shall for all purposes be deemed to be an original, and such
counterparts shall constitute but one and the same instrument.

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

                                      RAILAMERICA, INC.

                                      By: /s/ Gary O. Marino
                                         ------------------------------------

                                      AMERICAN STOCK TRANSFER & TRUST COMPANY

                                      By: /s/ Herbert J. Lemmer
                                         ------------------------------------
                                              Herbert J. Lemmer
                                              Vice-President

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