Raytheon Technologies Corp., Pratt and Whitney Military Engines, East Hartford, Connecticut, is awarded a $39,655,406 modification (P00058) to a previously awarded cost-plus-incentive-fee, cost-plus-fixed-fee, cost reimbursable, and fixed-price incentive (firm-target) undefinitized contract (N0001921C0011). This modification definitizes the contract and extends the period of performance to provide continued F135 propulsion system annual sustainment including recurring sustainment support, program management, financial and administrative activities, propulsion integration, replenishment spare part buys, engineering support, material management, configuration management, product management support, software sustainment, security management, joint technical data updates, support equipment management, depot level maintenance and repair for all fielded propulsion systems at the F-35 production sites and operational locations, as well as training. These efforts are in support of the F-35 Lightning II aircraft for the Air Force, Marine Corps, Navy, non-U.S. Department of Defense (DOD) participants, and Foreign Military Sales (FMS) customers. Work will be performed in East Hartford, Connecticut (40%); Oklahoma City, Oklahoma (21%); Indianapolis, Indiana (12%); Windsor Locks, Connecticut (6%); West Palm Beach, Florida (6%); Brekstad, Norway (4%); Leeuwarden, Netherlands (3%); Iwakuni, Japan (3%); Williamtown, Australia (2%); Cameri, Italy (1%); Marham, United Kingdom (1%); and Fort Worth, Texas (1%), and is expected to be completed in November 2024. Fiscal 2024 operations and maintenance (Air Force) funds in the amount of $14,261,362; fiscal 2024 operations and maintenance (Marine Corps) funds in the amount of $10,389,953; fiscal 2024 operations and maintenance (Navy) funds in the amount of $2,565,946; non-U.S. DOD participant funds in the amount of $8,404,939; and FMS funds in the amount of $4,033,206, will be obligated at time of award, $27,217,261 of which will expire at the end of the current fiscal year. Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.