48 CFR §642.271

1. (a)Policy. The contracting officer may appoint a Government Technical Monitor (GTM) to assist the Contracting Officer's Representative (COR) in monitoring a contractor's performance. The contracting officer may appoint a GTM because of physical proximity to the contractor's work site, or because of special skills or knowledge necessary for monitoring the contractor's work. The contracting officer may also appoint a GTM to represent the interests of another requirements office or post concerned with the contractor's work. A GTM shall be a direct-hire U.S. Government employee.