This solicitation seeks proposals to replace three mission essential systems at a Central Utility Plant on an Air Force base. The 50th Civil Engineer Squadron is soliciting to (1) replace transformers and associated electrical infrastructure in the transformer yard, (2) replace eight roof mounted exhaust fans and associated controls and louvers in the power generation area, and (3) replace obsolete generator synchronizers, load controllers, a PLC-based generator controller, and the generator operator HMI computer and programming. The solicitation was issued by the Department of the Air Force Space Command. Proposals are requested to replace aging equipment essential to base operations and upgrade obsolete control systems.