Lockheed Martin Rotary and Mission Systems, Manassas, Virginia, is awarded a $29,673,779 cost-plus-fixed-fee and cost-only modification to previously awarded contract N00024-19-C6-400 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 December 2023. Fiscal 2023 National Sea-Based Deterrence funds in the amount of $3,965,178 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.