General Dynamics Electric Boat Corp., Groton, Connecticut, is awarded a $145,000,000 cost-plus-fixed-fee modification to previously awarded contract (N00024-19-C-2125) for engineering, technical, design agent, and planning yard support for operational strategic and attack submarines. Work will be performed in Groton, Connecticut (70%); Kings Bay, Georgia (13%); Bangor, Washington (10%); Pearl Harbor, Hawaii (3%); North Kingston, Rhode Island (2%); and Newport, Rhode Island (2%), and is expected to be completed by September 2024. Fiscal 2024 other procurement (Navy) funds in the amount of $2,821,780 (89%); and fiscal 2023 other procurement (Navy) funds in the amount of $336,294 (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.