Raytheon Missiles & Defense, Tewksbury, Massachusetts, is awarded a $308,456,187 cost-plus-incentive-fee, cost-plus-fixed-fee, and cost-only modification to previously awarded contract N00024-22-C-5522 for an option exercise of Combat System engineering, miscellaneous material, and travel supporting Combat System installation, integration, development, testing, correction, maintenance, and modernization of Zumwalt-class mission systems and mission system equipment. Work will be performed in Tewksbury, Massachusetts (37%); Portsmouth, Rhode Island (37%); San Diego, California (22%); Nashua, New Hampshire (2%); Pascagoula, Mississippi (1%); and Fort Wayne, Indiana (1%), and is expected to be completed by April 2024. Fiscal 2023 operations and maintenance (Navy) funds in the amount of $17,806,180 (44%); fiscal 2023 shipbuilding and conversion (Navy) funds in the amount of $12,311,437 (30%); fiscal 2022 other procurement (Navy) funds in the amount of $5,613,206 (14%); fiscal 2023 research, development, test and evaluation (Navy) funds in the amount of $3,452,543 (9%); and fiscal 2023 other procurement (Navy) funds in the amount of $1,040,537 (3%) will be obligated at time of award, and $17,806,180 will expire at the end of the current fiscal year. In accordance with 10 U.S. Code 2304(c)(1), contract N00024-22-C-5522 for Zumwalt Combat System activation, sustainment, and modernization was not competitively awarded. Raytheon Missiles & Defense is the only responsible source, and no other supplies or services could fulfill the Navy’s requirement. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.