Raytheon Missiles and Defense, Tucson, Arizona, is awarded a $54,535,212 cost-plus-fixed-fee modification to previously-awarded contract N00024-18-C-5431 to exercise options for fiscal 2021 design agent and engineering support services for the Rolling Airframe Missile (RAM) upgraded MK-31 Guided Missile Weapon System Improvement Program. The MK-31 RAM Guided Missile Weapon System is a cooperative development and production program conducted jointly by the U.S. and the Federal Republic of Germany under memoranda of understanding. The support procured under the contract is required to maintain current weapon system capability as well as resolve issues through design, systems, software maintenance, reliability, maintainability, quality assurance and logistics engineering services. This contract combines purchases for the Navy (71%); and the government of Japan (29%) under the Foreign Military Sales (FMS) program. FMS Japan funds in the amount of $1,984,684 (29%); fiscal 2021 operations and maintenance (Navy) funds in the amount of $1,840,724 (27%); fiscal 2021 weapons procurement (Navy) funds in the amount of $1,510,968 (22%); fiscal 2020 research, development, test and evaluation (Navy) funds in the amount of $350,916 (5%); fiscal 2021 research, development, test and evaluation (Navy) funds in the amount of $343,697 (5%); fiscal 2021 shipbuilding and conversion (Navy) funds in the amount of $259,663 (4%); fiscal 2018 shipbuilding and conversion (Navy) funds in the amount of $173,374 (3%); German (Non-FMS) funds in the amount of $143,623 (2%); German (Non-FMS) funds in the amount of $143,507 (2%); and fiscal 2020 weapons procurement (Navy) funds in the amount of $89,616 (1%) will be obligated at the time of award, of which funds in the amount of $2,191,640 will expire at the end of the current fiscal year. Work will be performed in Tucson, Arizona, and is expected to be completed by July 2022. This contract was not competitively procured under the exception 10 U.S. Code 2304(c)(4), international agreement. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.