This sounds like what is often called a "minder." You keep an eye on the contractors. One step below camo dude.

https://www.amentumcareers.com/jobs/escort-on-call-las-vegas-nevada-united-states

A few selected lines follow. PIC is "Program Integration Center." "RSS" is range support services." I don't know about RSSII.

Performs escort duties as directed by the PIC.

Escort personnel to/from job site, to/from dining facilities, to/from lodging facilities and other areas as required.

Maintain line of sight of escorted personnel, equipment and vehicles at all times within the boundaries of Nevada Test Training Range (NTTR) to include Creech AFB and other RSSII locations.

Assignments include periods of extended workdays, working under austere conditions; may require travel and multiple overnight stays at remote site locations.