Engility Corp., Chantilly, Va., is being awarded a $39,969,545 indefinite-delivery/indefinite-quantity contract for electronic warfare (EW) weapons systems modifications for U.S. Navy and Australian EA-6B, EA-18G, E-2C, MH-60R, BAMS, P-8A aircraft, Unmanned Air Systems, flight simulators, training systems, other advanced electronic attack derivatives and initiatives. Services to be provided include systems engineering, in-service hardware and software engineering, intelligence data analysis, test and evaluation, EW systems development, threat analysis, threat defeat, mission planning, and EW data development. EW weapons systems modifications include weapon system software, on-call field engineering analysis, test and evaluation, studies and analysis, threat analysis and sensor intelligence mission data files, jammer techniques development and logistics for distribution of Operational Flight Programs. This contract combines purchases for the U.S. Navy ($37,971,068; 95 percent) and the government of Australia ($1,998,477; 5 percent) under the Foreign Military Sales Program. The Naval Air Warfare Center, Weapons Division, China Lake, Calif., is the contracting activity (N68936-14-D-0015).