Adams Communication and Engineering Technology Inc.,* Reston, Virginia, is awarded a $37,470,104 firm-fixed-price, cost-plus-fixed-fee, cost-reimbursement indefinite-delivery/indefinite-quantity contract. This contract provides for non-recurring and recurring efforts required to fabricate, assemble, and support prototyping, system integration, and installation of depot modifications associated with engineering changes to H-53 aircraft for the Navy, Marine Corps and Foreign Military Sales customers. Work will be performed in New River, North Carolina (40%); Miramar, California (35%); Patuxent River, Maryland (5%); Norfolk, Virginia (5%); McGuire, New Jersey (5%); Yuma, Arizona (3%); Okinawa, Japan (3%); Pohang, Korea (2%); and Manama, Bahrain (2%), and is expected to be completed in November 2027. No funds will be obligated at the time of award; funds will be obligated on individual orders as they are issued. This contract was competitively procured via an electronic request for proposal; four offers were received. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity (N0001923D0009).