Document:

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                                                                   Exhibit 10.15

                        FOURTH AMENDMENT TO OFFICE LEASE

         THIS FOURTH AMENDMENT TO OFFICE LEASE is made as of the 1st day of
April, 1999 by and between LEPERCQ CORPORATE INCOME FUND L.P., as
successor-in-interest to PGA PROFESSIONAL CENTER, LTD. ("Landlord") and THE
WACKENHUT CORPORATION ("Tenant").

                              W I T N E S S E T H :

         WHEREAS, Landlord and Tenant are parties to a certain Office Lease
dated April 18, 1995, as amended by a First Amendment to Office Lease dated
November 3, 1995, a Second Amendment to Office Lease dated August 1, 1996 and a
Third Amendment to Office Lease dated December 10, 1997 (the Office Lease as
amended is hereinafter collectively referred to as the "Lease");

         WHEREAS, Landlord and Tenant desire to further modify the Lease as
hereinafter set forth.

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

         1. The foregoing recitals are true and correct and are incorporated
herein by reference.

         2. Capitalized terms used but not defined herein shall have the
meanings given to such terms in the Lease.

         3. The Lease is in full force and effect. Neither Landlord nor Tenant
is in default thereunder, and to the knowledge of Landlord and Tenant, no events
have occurred which would, with the giving of notice or the passage of time, or
both, constitute an event of default under the Lease.

         4. As of April 1, 1999 (the "Expansion Date"), Tenant hereby leases
from Landlord approximately 2,859 square feet located in the Building (the
"Expansion Space") which was previously occupied by Tambone Real Estate
Development Corporation ("Tambone"). The parties acknowledge that Tenant has
dealt directly with Tambone as to the takeover of the Expansion Space. Landlord
shall have no liability to

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Tenant for any failure or refusal by Tambone to surrender the Expansion Space to
Tenant on the Expansion Date or for any holding over related to the Expansion
Space or any consequential or other damages that Tenant may suffer as a result
of any delay in obtaining possession of the Expansion Space.

         5. Tenant's occupancy of the Expansion Space shall be subject to all of
the terms and conditions of the Lease, as modified by this Amendment, except
that from and after the Expansion Date (a) the Annual Rental payable under the
Lease shall be increased by $54,778.44 and (b) Tenant's proportionate share
shall be increased to one hundred (100%) percent.

         6. Anything in Paragraph 5(a) above to the contrary notwithstanding, if
and so long as Tenant is not in default under this Lease beyond any grace
period, Tenant shall be entitled to a monthly rent credit equal to $4,564.87,
commencing on the Expansion Date and continuing for a total of four (4) months
for a total rent credit of $18,259.48.

         7. Sections 38 and 39 of the Lease are hereby deleted.

         8. Except as thereby modified, the Lease remains in full force and
effect. In the event of any conflict between the terms of the Lease and the
terms of this Amendment, the terms of this Amendment shall govern.

                                      -2-

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                  IN WITNESS WHEREOF, this Fourth Amendment to Office Lease has
been executed as of the day and year first above written.

     LANDLORD:                     LEPERCQ CORPORATE INCOME
                                   FUND L.P.
                                   By: Lex GP-1, Inc.

                                   By: /s/
                                       -----------------------------------------
                                       Name:
                                       Title:

     TENANT:                       THE WACKENHUT CORPORATION

                                   By: /s/ Francis E. Finizia
                                       -----------------------------------------
                                       Name: Francis E. Finizia
                                       Title: Corporate Counsel and
                                              Assistant Secretary

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                                                                   EXHIBIT 10.16

                    DESIGNATED EXECUTIVE OFFICER BONUS PLAN
                                FOR FISCAL 2000

ELIGIBILITY AND PARTICIPATION

Eligibility in this plan is limited to the Designated Senior Executive
Officers, which presently includes the following:

      o     Chairman of the Board and Chief Executive Officer
      o     President and Chief Operating Officer

TARGET INCENTIVE AWARDS

For fiscal year 2000, the percentages defined for each participant are shown
below:

                                          TARGET INCENTIVE AWARD
POSITION                                AS A PERCENT OF BASE SALARY
--------                                ---------------------------
COB/CEO                                            50%
Pres/COO                                           50%

PERFORMANCE MEASURES

                                                  CORPORATE
PERFORMANCE MEASURES                             PARTICIPANTS
--------------------                             ------------
Corporate Revenues                                   30%
Corporate Income Before Tax                          70%
                                                   ----
Total                                               100%

DEFINITION OF CORPORATE INCOME

This definition excludes extraordinary items and changes in accounting
principles, as defined by GAAP.

Extraordinary items, as defined by GAAP, include items of a very unusual and
infrequent nature, a good example of which is a loss incurred in the early
extinguishment of debt.

Changes in accounting principles as a result of new pronouncements or
requirements issued by accounting authorities such as SEC, FASB, etc.

Non-recurring and unusual items not included or planned for in the budgeted
bonus targets may be excluded from the corporate income before income taxes, as
defined, at the recommendation of management and at the discretion and
agreement of the Nominating and Compensation Committee.<PAGE>   1
                                                                   EXHIBIT 10.17

                           THE WACKENHUT CORPORATION
                          SENIOR MANAGEMENT BONUS PLAN
                                FOR FISCAL 2000

ELIGIBILITY AND PARTICIPATION

Eligibility in this plan is limited to the Senior Officers, which presently
includes the following:

      o     Chairman of the Board and Chief Executive Officer
      o     President and Chief Operating Officer
      o     EVP & President -- North American Operations Group
      o     SVP -- Chief Financial Officer
      o     SVP & President -- Wackenhut International, Inc.
      o     SVP -- Corporate Planning & Development and President & CEO,
            Wackenhut Resources, Inc.
      o     SVP -- General Counsel & Assistant Secretary
      o     SVP -- Human Resources

TARGET INCENTIVE AWARDS

For fiscal year 2000, the percentages defined for each participant are shown
below.

                                             TARGET INCENTIVE AWARD
POSITION                                     AS A PERCENTAGE OF BASE
--------                                     ------------------------
COB/CEO                                               35%
Pres/COO                                              35%
EVPs                                                  35%
SVPs                                                  35%

PERFORMANCE MEASURES

                                   CORPORATE             BUSINESS UNIT
PERFORMANCE MEASURES             PARTICIPANTS            PARTICIPANTS
--------------------             ------------            -------------
Corporate Revenues                    30%                     30%
Corporate Income Before Taxes         70%                     30%
Business Unit Service Profit           0%                     40%
                                    ----                    ----
Total                                100%                    100%

DEFINITION OF CORPORATE INCOME

This definition excludes extraordinary items and changes in accounting
principles, as defined by GAAP.

Extraordinary items, as defined by GAAP, include items of a very unusual and
infrequent nature, a good example of which is a loss incurred in the early
extinguishment of debt.

Changes in accounting principles as a result of new pronouncements or
requirements issued by accounting authorities such as SEC, FASB, etc.
Non-recurring and unusual items not included or planned for in the budgeted
bonus targets may be excluded from the

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corporate income before income taxes, as defined, at the recommendation of
management and at the discretion and agreement of the Nominating and
Compensation Committee.

AWARD DETERMINATION

Based on performance achieved during the year, a participant's award payout
will be a function of performance against pre-established goals for each
performance measure, as shown in the following chart:

PERFORMANCE                                     PAYOUT AS PERCENT
 ACHIEVED                                   OF TARGET INCENTIVE AWARD
-----------                                 -------------------------
Outstanding                                           150%
Target                                                100%
Threshold                                              50%
Below threshold                                         0%

Threshold, Target, and Outstanding performance levels will be defined at the
beginning of each year for each performance measure.

DISCRETIONARY JUDGMENT

For other plan participants, the CEO and COO may recommend an adjustment to an
individual's incentive award to reflect individual performance. For the CEO
and COO themselves, recommended adjustments, if any, will be made by the
Nominating and Compensation Committee. All recommended adjustments will be
subject to review and approval by the Committee.

Adjustments will be based on the following guidelines:

EVALUATION OF                                   MULTIPLY
INDIVIDUAL PERFORMANCE                          AWARD BY:
----------------------                         -----------
Outstanding                                       150%
Normal Performance                                100%
Clearly below desired                            0-80%

GOVERNANCE

The Nominating and Compensation Committee of the Board of Directors of The
Wackenhut Corporation is responsible for the administration and governance of
the plan. Actions requiring Committee approval include final determination of
plan eligibility and participation, Identification of performance goals, and
final award determination. The decision of the Committee shall be conclusive
and binding on all participants.

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