General Dynamics Electric Boat, Groton, Connecticut, is awarded a $46,485,540 cost-plus-fixed-fee contract modification exercising the fourth option year (of four option years) under contract (N00024-18-C-4301) to provide a Nuclear Regional Maintenance Department at Naval Submarine Base New London, Connecticut, in support of returning mission-ready submarines to the fleet. This contract modification brings the cumulative value of this contract to $208,632,898. Work will be performed in Groton, Connecticut, and is expected to be completed by November 2022. Fiscal 2022 operation and maintenance (Navy) funds in the amount of $5,500,000 will be obligated at time of award and will expire at the end of the current fiscal year. In accordance with 10 U.S. Code 2304(c)(1), this contract was not competitively procured — only one responsible source and no other supplies or services will satisfy agency requirements. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.