This Agreement is made as of the 10th day of March, 2000 between IGS Acquisition Corporation, a Texas
corporation, with offices at 12200 Stemmons, Suite 315, Dallas, Texas 75234 (the "Company") and Patrick
Mackey, an individual residing in the State of Texas (the "Employee").
WHEREAS, the Company desires to secure the services and employment of the Employee on behalf of the
Company, and the Employee desires to enter into employment with the Company, upon the terms and conditions
hereinafter set forth.
NOW, THEREFORE, in consideration of the mutual covenants and promises contained herein, the parties
hereto, each intending to be legally bound hereby, agree as follows:
1. Employment. The Company hereby employs the Employee as Chief Financial Officer of the Company, and the
Employee accepts such employment for the term of employment specified in Section 3 below. During the
Employment Term (as defined below), the Employee shall serve as Chief Financial Officer, performing such
duties as shall be reasonably required of such an employee of the Company, and shall have such other powers
and perform such other additional executive duties as may from time to time be assigned to him by the senior
management or the Board of Directors of the Company or such other person designated by the senior
management or the Board of Directors of the Company. The Company acknowledges that the Employee's
primary place of business shall be Dallas, Texas and the Employee acknowledges that in performance of his
duties hereunder, the Employee shall be required to travel to the Company's facilities located throughout the
2. Performance. The Employee will serve the Company faithfully and to the best of his ability and will devote
substantially all of his time, energy, experience and talents during regular business hours and as otherwise
reasonably necessary to such employment, to the exclusion of all other business activities.
3. Employment Term. The employ