Starfleet Operational Support Services was an agency of Starfleet in the 2360s. This branch worked in conjunction with starbases and other Starfleet facilities. Their duties included routine maintenance of Starfleet starships, the upgrading of ships' computers, and the repairing of damaged ships.

Starbase 74, orbiting Tarsas III, worked with this agency in performing routine maintenance and computer upgrades on the USS Enterprise and in repairing the USS Melbourne in 2364. (TNG: "11001001")