In this chapter: (1) COMPENSATION.-The term "compensation" means any of the payments or fringe benefits described in section 6703 of this title. (2) SECRETARY.-The term "Secretary" means the Secretary of Labor. (3) SERVICE EMPLOYEE.-The term "service employee"- (A) means an individual engaged in the performance of a contract made by the Federal Government and not exempted under section 6702(b) of this title, whether negotiated or advertised, the principal purpose of which is to furnish services in