The Charles Stark Draper Laboratory, Cambridge, Massachusetts, is awarded a $202,511,235 cost-plus-incentive-fee, cost-plus-fixed-fee, level-of-effort, and cost-plus-fixed-fee completion modification to a previously awarded contract (N0003022C6002). This modification exercises fiscal 2023 options to provide technical and engineering services necessary to maintain and sustain the Trident II Strategic Weapon System MK 6 Guidance subsystem. The effort also includes a requirement for strategic guidance, navigation, and control subject matter expertise to research and develop current and maturing concepts and technologies that will enable follow-on, full-scale development of the second life extension of the Navy’s Trident II (D5) Strategic Weapons Systems. Additional scope includes research and development of new and alternate strategic guidance, navigation, and control technologies to support alternate and developing Strategic Systems Programs missions, integration support for Columbia/Dreadnought ship construction, reentry subsystem support and support for the Conventional Prompt Strike/Hypersonic development. Work will be performed in Cambridge, Massachusetts (81%); and El Segundo, California (19%). Work is expected to be completed Nov. 30, 2024. Fiscal 2022 research and development test and evaluation (Navy) funds in the amount of $50,000; fiscal 2023 research and development test and evaluation (Navy) funds in the amount of $8,963,521; fiscal 2023 weapons procurement (Navy) funds in the amount of $10,990,989; and fiscal 2023 operations and maintenance (Navy) funds in the amount of $18,546,768 will be obligated at the time of modification. Funds in the amount of $18,596,768 will expire at the end of the current fiscal year. This contract was awarded as a sole-source acquisition pursuant to 10 U.S. Code 2304(c)(1). Strategic Systems Programs, Washington, D.C., is the contracting activity.