Raytheon Technologies Corp., Pratt and Whitney Military Engines, East Hartford, Connecticut, is awarded a not-to-exceed $701,923,926 undefinitized modification (P00045) to a previously awarded cost-plus-incentive-fee, cost-plus-fixed-fee, cost reimbursable, fixed-price incentive (firm-target) contract (N0001921C0011). This modification exercises options to provide continued recurring sustainment, program management (financial and administrative), propulsion integration, engineering, material management, configuration management, software sustainment, security management, equipment management, product management support activities, and spare replenishments. Additionally, this modification provides for continued joint technical data updates, training, and depot level maintenance and repair for all fielded propulsion systems at the F-35 production sites and operational locations for the Navy, Marine Corps, Air Force, non-U.S. Department of Defense (DOD) partners, and Foreign Military Sales (FMS) customers. Work will be performed in East Hartford, Connecticut (40%); Oklahoma City, Oklahoma (21%); Indianapolis, Indiana (12%); West Palm Beach, Florida (6%); Windsor Locks, Connecticut (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 May 2024. Fiscal 2024 operation and maintenance (Air Force) funds in the amount of $40,650,497; fiscal 2024 operation and maintenance (Marine Corps) funds in the amount of $37,351,800; fiscal 2024 operation and maintenance (Navy) funds in the amount of $7,135,267; FMS customer funds in the amount of $7,504,760; and non-U.S. DOD participant funds in the amount of $15,753,447 will be obligated at the time of award, $85,137,564 of which will expire at the end of the current fiscal year. Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.