Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a not-to-exceed $53,100,000 undefinitized cost-plus-fixed-fee modification (P00044) to a previously awarded contract. This modification adds scope for non-recurring engineering, delivery and installation of F-35 Joint Strike Fighter Pilot Training and Maintainer Training technical refresh hardware. Work will be performed in Orlando, Florida (80%); Eglin Air Force Base, Florida (15%); and Fort Worth, Texas (5%), and is expected to be completed in January 2025. Fiscal 2022 aircraft procurement (Air Force) funds in the amount of $8,135,907; fiscal 2021 aircraft procurement (Navy) funds on the amount of $3,799,340; Foreign Military Sales funds in the amount of $6,529,432; and non-U.S. DOD participant funds in the amount of $8,085,320 will be obligated at time of award, none of which will expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.