General Dynamics Electric Boat Corp., Groton, Connecticut, is awarded a $376,788,600 cost-plus-fixed-fee modification to previously awarded contract N00024-20-C-2120 for Lead Yard support, and development studies and design efforts related to Virginia Class submarines. Work will be performed in Groton, Connecticut (92%); McLeansville, North Carolina (6%); Newport News, Virginia (1%); and Newport and Quonset, Rhode Island (1%), and is expected to be completed by October 2025. Fiscal 2022 shipbuilding and conversion (Navy) funding in the amount of $45,981,338 (35%); fiscal 2024 research, development, test and evaluation (Navy) funding in the amount of $28,695,643 (22%); fiscal 2021 shipbuilding and conversion (Navy) funding in the amount of $22,754,592 (17%); fiscal 2023 shipbuilding and conversion (Navy) funding in the amount of $19,053,112 (15%); and fiscal 2024 shipbuilding and conversion (Navy) funding in the amount of $13,944,171 (11%), will be obligated at time of award and will not expire at the end of the current fiscal year. Naval Sea Systems Command, Washington, D.C., is the contracting activity.