Document:

<PAGE>   1
                                                                   Exhibit 4.15

                            AMENDMENT AGREEMENT NO. 6
                             TO AMENDED AND RESTATED
                  REVOLVING CREDIT AND REIMBURSEMENT AGREEMENT

         THIS AMENDMENT AGREEMENT (this "Amendment Agreement") is made and
entered into as of this 19th day of May, 1999, by and among THE WACKENHUT
CORPORATION, a Florida corporation (herein called the "Borrower"), NATIONSBANK
NATIONAL ASSOCIATION (the "Agent"), as Agent for the lenders (the "Lenders")
party to the Amended and Restated Revolving Credit and Reimbursement Agreement
dated December 30, 1997, as amended by Amendment Agreement No. 1 dated as of
March 12, 1998, Amendment Agreement No. 2 dated as of August 7, 1998, Amendment
Agreement No. 3 dated as of February 10, 1999, Amendment Agreement No. 4 dated
as of February 25, 1999 and Amendment No. 5 dated April 12, 1999 among such
Lenders, Borrower and the Agent (the "Agreement") and the Lenders whose names
are subscribed hereto.

                              W I T N E S S E T H:

         WHEREAS, the Borrower, the Agent and the Lenders have entered into the
Agreement pursuant to which the Lenders have agreed to make revolving loans to
the Borrower in the aggregate principal amount of up to $65,000,000 as evidenced
by the Notes (as defined in the Agreement) and to issue Letters of Credit for
the benefit of the Borrower; and

         WHEREAS, as a condition to the making of the loans pursuant to the
Agreement the Lenders have required that all wholly-owned Subsidiaries of the
Borrower guarantee payment of all Obligations of the Borrower arising under the
Agreement; and

         WHEREAS, the Borrower has requested that the Agreement be further
amended in the manner described herein and the Agent and the Required Lenders
have agreed, subject to the terms and conditions hereof, to make such amendment,
as provided herein;

         NOW, THEREFORE, the Borrower, the Agent and the Lenders party hereto do
hereby agree as follows:

         1. DEFINITIONS. The term "Agreement" as used herein and in the Loan
Documents (as defined in the Agreement) shall mean the Agreement as hereinafter
amended and modified. Unless the context otherwise requires, all terms used
herein without definition shall have the definition provided therefor in the
Agreement.

         2. AMENDMENT. Subject to the conditions set forth herein, the Agreement
is hereby amended, effective as of the date hereof, as follows:

                  (a) The definition of "Applicable Margin" in SECTION 1.01 is
         hereby amended by adding the following new sentence at the end of such
         definition:

                  "Notwithstanding the foregoing, if at anytime the certificate
                  furnished to the Agent pursuant to SECTION 7.17(f) shall
                  disclose that Consolidated Funded Debt (excluding Funded Debt
                  of WCC from Consolidated Funded Debt) exceeds 40% of Total
                  Capitalization and does not exceed 50% of Total
                  Capitalization, then their shall be added to the Applicable
                  Margin set forth above, 0.250%."

                  (b) SECTION 7.07(a) is hereby amended in its entirety so that
         as amended it shall read as follows:

         "(a) The Borrower will at all times keep and maintain Consolidated
Funded Debt (excluding Funded Debt of WCC from Consolidated Funded Debt) in an
amount not to exceed 50% of Total Capitalization."

<PAGE>   2

         3. SUBSIDIARY CONSENTS. Each Subsidiary of the Borrower that has
delivered a Guaranty to the Agent has joined in the execution of this Amendment
Agreement for the purpose of (i) agreeing to the amendment to the Agreement and
(ii) confirming its guarantee of payment of all the Obligations.

         4. REPRESENTATIONS AND WARRANTIES. The Borrower hereby represents and
warrants that:

                  (a) The representations and warranties made by Borrower in
         Article VI of the Agreement are true on and as of the date hereof;

                  (b) There has been no material adverse change in the
         condition, financial or otherwise, of the Borrower and its Subsidiaries
         since the date of the most recent financial reports of the Borrower
         received by each Lender under Section 7.17 thereof, other than changes
         in the ordinary course of business, none of which has been a material
         adverse change;

                  (c) The business and properties of the Borrower and its
         Subsidiaries are not and have not been adversely affected in any
         substantial way as the result of any fire, explosion, earthquake,
         accident, strike, lockout, combination of workers, flood, embargo,
         riot, activities of armed forces, war or acts of God or the public
         enemy, or cancellation or loss of any major contracts; and

                  (d) No event has occurred and no condition exists which, upon
         the consummation of the transaction contemplated hereby, constitutes a
         Default or an Event of Default on the part of the Borrower under the
         Agreement, the Notes or any other Loan Document either immediately or
         with the lapse of time or the giving of notice, or both.

         5. CONDITIONS. This Amendment Agreement shall become effective upon the
Borrower delivering to the Agent five (5) counterparts of this Amendment
Agreement duly executed by the Borrower, the Agent and the Required Lenders and
consented to by each of the Subsidiaries and receipt by the Agent of all fees
and expenses due in connection with this Amendment Agreement.

         6. ENTIRE AGREEMENT. This Amendment Agreement sets forth the entire
understanding and agreement of the parties hereto in relation to the subject
matter hereof and supersedes any prior negotiations and agreements among the
parties relative to such subject matter. No promise, conditions, representation
or warranty, express or implied, not herein set forth shall bind any party
hereto, and no one of them has relied on any such promise, condition,
representation or warranty. Each of the parties hereto acknowledges that, except
as in this Amendment Agreement otherwise expressly stated, no representations,
warranties or commitments, express or implied, have been made by any other party
to the other. None of the terms or conditions of this Amendment Agreement may be
changed, modified, waived or canceled orally or otherwise, except by writing, in
the manner provided in the Agreement, specifying such change, modification,
waiver or cancellation of such terms or conditions, or of any proceeding or
succeeding breach thereof.

         7. FULL FORCE AND EFFECT OF AGREEMENT. Except as hereby specifically
amended, modified or supplemented, the Agreement and all of the other Loan
Documents are hereby confirmed and ratified in all respects and shall remain in
full force and effect according to their respective terms.

                  [Remainder of page intentionally left blank.]

                                       2
<PAGE>   3
         IN WITNESS WHEREOF, the parties hereto have caused this Amendment
Agreement to be duly executed by their duly authorized officers, all as of the
day and year first above written.

                                           BORROWER:

                                           THE WACKENHUT CORPORATION

WITNESS:

                                            By: /s/ Mildred F. Smith
                                                --------------------------------
                                                Name:Mildred F. Smith
/s/ Claire Nabb                                 Title: Vice President
---------------------------

                                       3
<PAGE>   4

                                   GUARANTORS:

                                          AMERICAN GUARD AND ALERT, INCORPORATED
                                          TITANIA ADVERTISING, INCORPORATED
                                          TITANIA INSURANCE COMPANY OF AMERICA
                                          TUHNEKCAW, INC.
                                          WACKENHUT AIRLINE SERVICES, INC.
                                          WACKENHUT EDUCATIONAL SERVICES, INC.
                                          WACKENHUT FINANCIAL, INC.
                                          WACKENHUT INTERNATIONAL, INCORPORATED
                                          WACKENHUT OF NEVADA, INC.
                                          WACKENHUT PUERTO RICO, INC.
                                          WACKENHUT SERVICES, INCORPORATED
                                          WACKENHUT SERVICES LIMITED LIABILITY
                                            COMPANY
                                          WACKENHUT RESOURCES, INCORPORATED
                                          KING STAFFING, INC.
                                          SOUTHEASTERN RESOURCES, INC.
                                          WORKFORCE ALTERNATIVE, INC.
                                          KING TEMPORARY STAFFING, INC.
                                          WRI II, INC.
                                          PROFESSIONAL EMPLOYEE MANAGEMENT, INC.

WITNESS:

                                            By: /s/ Mildred F. Smith
                                                --------------------------------
                                                Name:Mildred F. Smith
/s/ Claire Nabb                                 Title: Vice President
---------------------------

                                       4
<PAGE>   5

                                          NATIONSBANK, NATIONAL ASSOCIATION,
                                          as Agent for the Lenders

                                          By: /s/ John E. Williams
                                              ----------------------------------
                                              Name:  John E. Williams
                                              Title: Senior Vice President

                                          NATIONSBANK, NATIONAL ASSOCIATION,
                                          as Lender

                                          By: /s/ John E. Williams
                                              ----------------------------------
                                              Name:  John E. Williams
                                              Title: Senior Vice President

                                          SCOTIABANC INC.

                                          By: /s/ W.J. Brown
                                              ----------------------------------
                                              Name:  W.J. Brown
                                              Title: Managing Director

                                          SUNTRUST BANK, SOUTH FLORIDA, N.A.

                                          By: /s/ William H. Crawford
                                              ----------------------------------
                                              Name:  William H. Crawford
                                              Title: Assistant Vice President

                                          FIRST UNION NATIONAL BANK

                                          By: /s/ Mareen Walker Duvall
                                              ----------------------------------
                                              Name:  Mareen Walker Duvall
                                              Title: Senior Vice President

                                       5<PAGE>   1
                                                                   EXHIBIT 4.16

                            AMENDMENT AGREEMENT NO. 7
                             TO AMENDED AND RESTATED
                  REVOLVING CREDIT AND REIMBURSEMENT AGREEMENT

         THIS AMENDMENT AGREEMENT (this "Amendment Agreement") is made and
entered into as of December 31, 1999, by and among THE WACKENHUT CORPORATION, a
Florida corporation (herein called the "Borrower"), BANK OF AMERICA, N.A.
(formerly NationsBank, N.A.) (the "Agent"), as Agent for the lenders (the
"Lenders") party to the Amended and Restated Revolving Credit and Reimbursement
Agreement dated December 30, 1997, as amended by Amendment Agreement No. 1 dated
as of March 12, 1998, Amendment Agreement No. 2 dated as of August 7, 1998,
Amendment Agreement No. 3 dated as of February 10, 1999, Amendment Agreement No.
4 dated as of February 25, 1999, Amendment No. 5 dated April 12, 1999 and
Amendment Agreement No. 6 dated as of May 19, 1999 among such Lenders, Borrower
and the Agent (the "Agreement") and the Lenders whose names are subscribed
hereto.

                                 R E C I T A L S

         WHEREAS, the Borrower, and the Agent and the Lenders have entered into
the Agreement pursuant to which the Lenders have agreed to make revolving loans
to the Borrower in the aggregate principal amount of up to $65,000,000 as
evidenced by the Notes (as defined in the Agreement) and to issue Letters of
Credit for the benefit of the Borrower; and

         WHEREAS, as a condition to the making of the loans pursuant to the
Agreement the Lenders have required that all wholly-owned Subsidiaries of the
Borrower guarantee payment of all Obligations of the Borrower arising under the
Agreement; and

         WHEREAS, the Borrower has requested that the Agreement be further
amended in the manner described herein and the Agent and the Required Lenders
have agreed, subject to the terms and conditions hereof, to make such amendment,
as provided herein;

                                A G R E E M E N T

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

         1. DEFINITIONS. The term "Agreement" as used herein and in the Loan
Documents (as defined in the Agreement) shall mean the Agreement as hereinafter
amended and modified. Unless the context otherwise requires, all terms used
herein without definition shall have the definition provided therefor in the
Agreement

<PAGE>   2

         2. AMENDMENT. Section 7.14 of the Original Loan Agreement is hereby
deleted in its entirety and replaced with the following:

         "7.14 GUARANTIES. The Borrower will not, and will not permit any
Subsidiary to, become or be liable in respect of any Guaranty, except for (a)
the Guaranty Agreements and (b) other Guaranties which in the aggregate do not
provide for the guaranty of amounts in an aggregate principal amount exceeding
$3,000,000 at any time."

         3. SUBSIDIARY CONSENTS. Each Subsidiary of the Borrower that has
delivered a Guaranty to the Agent has joined in the execution of this Amendment
Agreement for the purpose of (i) agreeing to the Agreement and (ii) confirming
its guarantee of payment of all the Obligations.

         4. REPRESENTATIONS AND WARRANTIES. The Borrower hereby represents and
warrants that:

                  (a) The representations and warranties made by Borrower in
         Article VI of the Agreement are true on and as of the date hereof;

                  (b) There has been no material adverse change in the
         condition, financial or otherwise, of the Borrower and its Subsidiaries
         since the date of the most recent financial reports of the Borrower
         received by each Lender under Section 7.17 thereof, other than changes
         in the ordinary course of business, none of which has been a material
         adverse change;

                  (c) The business and properties of the Borrower and its
         Subsidiaries are not and have not been adversely affected in any
         substantial way as the result of any fire, explosion, earthquake,
         accident, strike, lockout, combination of workers, flood, embargo,
         riot, activities of armed forces, war or acts of God or the public
         enemy, or cancellation or loss of any major contracts; and

                  (d) No event has occurred and no condition exists which, upon
         the consummation of the transaction contemplated hereby, constitutes a
         Default or an Event of Default on the part of the Borrower under the
         Agreement, the Notes or an other Loan Document either immediately or
         with the lapse of time or the giving of notice, or both.

         5. CONDITIONS. This Amendment Agreement shall become effective upon the
Borrower delivering to the Agent a counterpart of this Amendment Agreement duly
executed by the Borrower, the Agent and the Required Lenders and consented to by
each of the Subsidiaries and receipt by the Agent of all fees and expenses, if
any, due in connection with this Amendment Agreement.

         6. NO OTHER AMENDMENTS. Except as modified hereby, all other terms,
conditions and provisions of the Agreement shall remain in full force and
effect.

                                       2
<PAGE>   3

         7. COUNTERPARTS. This Amendment Agreement may be executed in any number
of counterparts, each of which when executed and delivered shall be deemed to be
an original and it shall not be necessary in making proof of this Amendment
Agreement to produce or account for more than one such counterpart. The parties
hereto acknowledge and agree that executed signature pages delivered via
facsimile shall have the same force and legal effect as originally executed
counterparts.

         8. GOVERNING LAW. This Amendment shall be governed by, and construed in
accordance with, the laws of the State of Florida.

                           [signature pages to follow]

                                       3
<PAGE>   4

         IN WITNESS WHEREOF, each of the parties hereto has caused this
Amendment Agreement to be duly executed and delivered by its duly authorized
officer as of the date first above written.

                                    BORROWER:

                                    THE WACKENHUT CORPORATION

                                    By: /s/ Philip Maslowe
                                        ----------------------------------------
                                    Name:  Philip Maslowe
                                    Title: Chief Financial Officer

                                    GUARANTORS:

                                    AMERICAN GUARD AND ALERT, INCORPORATED
                                    TITANIA ADVERTISING, INCORPORATED
                                    TITANIA INSURANCE COMPANY OF AMERICA
                                    TUHNEKCAW, INC.
                                    WACKENHUT AIRLINE SERVICES, INC.
                                    WACKENHUT EDUCATIONAL SERVICES, INC.
                                    WACKENHUT FINANCIAL, INC.
                                    WACKENHUT INTERNATIONAL, INCORPORATED
                                    WACKENHUT OF NEVADA, INC.
                                    WACKENHUT PUERTO RICO, INC.
                                    WACKENHUT SERVICES, INCORPORATED
                                    WACKENHUT SERVICES LIMITED LIABILITY
                                       COMPANY
                                    WACKENHUT RESOURCES, INCORPORATED
                                    KING STAFFING, INC.
                                    SOUTHEASTERN RESOURCES, INC.
                                    WORKFORCE ALTERNATIVE, INC.
                                    KING TEMPORARY STAFFING, INC
                                    WRI II, INC.
                                    PROFESSIONAL EMPLOYEE MANAGEMENT, INC.

                                    By: /s/ Ian Green
                                        ----------------------------------------
                                    Name:  Ian Green
                                    Title: Asst. Treasurer

                                       4
<PAGE>   5

                                   BANK OF AMERICA, N.A., as Agent
                                   and as a Lender

                                   By: /s/ John E. Williams
                                       -----------------------------------------
                                       Name:  John E. William
                                       Title: Managing Director

                                   SCOTIABANC INC., as Co-Agent and as a Lender

                                   By: /s/ Frank F. Sandler
                                       -----------------------------------------
                                       Name:  Frank F. Sandler
                                       Title: Relationship Manager

                                   SUNTRUST BANK, SOUTH FLORIDA,
                                   N.A., as a Lender

                                   By: /s/ William H. Crawford
                                       -----------------------------------------
                                       Name:  William H. Crawford
                                       Title: Assistant Vice President
                                              Suntrust Banks, Inc.

                                   FIRST UNION NATIONAL BANK, as a Lender

                                   By:
                                       -----------------------------------------
                                       Name:
                                       Title:

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}]]