United States, June 25 -- Strategic Mission Systems LLC, Oklahoma City, Oklahoma, has been awarded an indefinite-delivery/indefinite-quantity contract with a not to exceed ceiling of $984,000,000 for E-4B sustainment and modernization. This contract provides for communication support services for E-4B mission systems.Work will be performed in Oklahoma City, Oklahoma; San Antonio, Texas; and at Offutt Air Force Base, Nebraska, and is expected to be completed by June 24, 2037. This award is the result of a sole source acquisition.Fiscal 2026 operations and maintenance funds in the amount of $24,866,449 are being obligated at the time of award. The Air Force Life Cycle Management Center, Tinker AFB, Oklahoma, is the contracting activity. (FA81...