Lockheed Martin Rotary and Mission Systems, Manassas, Virginia, is awarded a $29,116,744 cost-plus-fixed-fee and cost-only modification to previously awarded contract N00024-19-C-6400 to exercise options for systems engineering and integration on Navy submarines. Work will be performed in Manassas, Virginia (68%); Waterford, Connecticut (10%); Groton, Connecticut (10%); Middletown, Rhode Island (7%); and Newport, Rhode Island (5%), and is expected to be completed by April 2023. Fiscal 2020 shipbuilding and conversion (Navy) funds in the amount of $1,981,745 (37%); fiscal 2022 research, development, test and evaluation (Navy) funds in the amount of $1,984,423 (37%); and fiscal 2022 National Sea-Based Deterrence funds in the amount of $1,394,753 (26%) will be obligated at time of award and will not expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.