J.F. Taylor Inc, Great Mills, Maryland, is awarded a $563,189,472 cost-plus-fixed-fee, indefinite-delivery/indefinite-quantity contract. This contract provides continued design, development, documentation, coding and/or fabrication, integration and delivery of simulation systems supporting research, development, test and evaluation (RDT&E) and acquisition program activities as well as fleet operator training. This requirement also includes associated services for the upgrade, maintenance, and sustainment of simulation systems and the operational support of those systems associated with RDT&E activities for the Navy. Work will be performed in Patuxent River, Maryland (55%); and Great Mills, Maryland (45%), and is expected to be completed in September 2029. 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; one offeror was received. Naval Air Warfare Center, Patuxent River, Maryland, is the contracting activity (N0042124D0021).