Lockheed Martin Services LLC, Colorado Springs, Colorado, has been awarded a $462,000,000 indefinite-delivery/indefinite-quantity contract for Global Positioning Systems Control-Segment Sustainment II. The contract provides depot-level software maintenance; organizational-level hardware and software maintenance; support to and integration of GPS Acquisition Category III programs onto the operational control system platform; systems engineering; Technical Order Management Agency support; maintenance and sustainment of the consolidated test environment; and non-recurring engineering and studies, as required.  Work will be performed in Colorado Springs, Colorado, is expected to be completed by Dec. 31, 2025. This award is the result of a sole-source acquisition and one offer was received. Fiscal 2019 operations and maintenance funds in the amount of $41,524,038 are being obligated at the time of award. Space and Missile Systems Center, Peterson Air Force Base, Colorado, is the contracting activity (FA8823‐19‐D‐0001).