The Department of Defense, specifically the Department of the Army, is seeking maintenance and service for the GSS9000 2 RF GPS L1/L2, GLONASS L1/L2, and Galileo E1/E5 Simulator systems provided by Spirent Federal Systems. The procurement includes comprehensive support services such as software and firmware upgrades, technical assistance, hardware and software repairs, and online support, required over a five-year period consisting of a 12-month base period followed by four optional 12-month extensions. These simulators play a critical role in geospatial positioning and navigation systems, ensuring operational readiness and accuracy for military applications. Interested vendors can reach out to Audrey M. York-Nicola at audrey.m.york6.civ@mail.mil or by phone at 433-861-4642 for further details regarding this opportunity.