Raytheon Technologies Corp. and Pratt and Whitney Military Engines, East Hartford, Connecticut, is awarded a $579,837,316 indefinite-delivery/indefinite-quantity contract, which includes $146,269,941 firm-fixed-price undefinitized line items and $433,567,375 firm-fixed-price, fixed-price-incentive-firm-target, cost-plus-fixed-fee definitized line items. This contract provides unit and depot level F-135 propulsion system spare parts, spare engines and modules in support of the F-135 propulsion initial spares requirements for the Air Force, Navy, Marine Corps, non-Department of Defense participants and Foreign Military Sales customers. Work will be performed in East Hartford, Connecticut (93%); Indianapolis, Indiana (6%); and Bristol, United Kingdom (1%), and is expected to be completed in December 2024. No funds will be obligated at the time of award. Funds will be obligated on individual orders as they are issued. This contract was not competitively procured pursuant to 10 U.S. Code 2304(c)(1). The Naval Air Systems Command, Patuxent River, Maryland, is the contracting aenginesctivity (N00019-20-D-0013).