General Dynamics Electric Boat Corp., Groton, Connecticut, is awarded a $63,805,144 cost-plus-fixed-fee, cost-plus-incentive-fee modification to previously-awarded contract N00024-20-C-4312 for smart start maintenance, repair, and modernization efforts in support of USS Hartford (SSN 768) engineered overhaul. Work will be performed in Groton, Connecticut, and is expected to be completed by February 2022. Fiscal 2021 operation and maintenance (Navy) funds in the amount of $63,033,618 (99%); and fiscal 2021 other procurement (Navy) funds in the amount of $771,526 (1%) will be obligated at the time of award, of which, funds in the amount of  $63,033,618 will expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.