Northrop Grumman Systems Corp., San Diego, California, was awarded a $158,126,213 definitized contract action for Global Hawk (RQ-4) aircraft sustainment. The contract provides for contractor logistics support as well as two engineering change proposals to support diminishing manufacturing sources. Work will be performed in the Republic of Korea and San Diego, California, and is expected to be completed by March 31, 2026. This contract involves Foreign Military Sales (FMS) to the Republic of Korea. This contract was a sole source acquisition. FMS funds in the amount of $158,126,213 are being obligated at the time of award. Air Force Life Cycle Management Center, Wright-Patterson Air Force Base, Ohio, is the contracting activity (FA8690-23-C-1001).