General Dynamics Mission Systems, Pittsfield, Massachusetts, is awarded $28,957,961 for contract modification P00030 to a previously awarded cost-plus-incentive-fee, cost-plus-fixed-fee contract (N00030-16-C-0005) for sustainment of the U.S. and United Kingdom (UK) SSBN fire control system, the U.S. SSGN Attack Weapon Control System, including training and support equipment. Also included is the missile fire control for the U.S. Columbia-class and UK Dreadnought-class Common Missile Compartment program development, through first unit UK production, and Strategic Weapon Interface Simulator. Work will be performed in Pittsfield Massachusetts (90.5 percent); Bremerton, Washington, (3.6 percent); Kings Bay, Georgia (2.7 percent); Dahlgren, Virginia (1 percent); Cape Canaveral, Florida (0.9 percent); Portsmouth, Virginia (0.9 percent); and the United Kingdom (0.4 percent), with an expected completion date of Sept. 30, 2023. Fiscal 2019 operations and maintenance (Navy) funds in the amount of $20,139,048; and United Kingdom funds in the amount of $2,726,000 are being obligated on this award. Funds in the amount of $20,139,048 will expire at the end of the current fiscal year. Fiscal 2019 operations and maintenance (Navy) funds in the amount of $5,183,913; and United Kingdom funds in the amount of $909,000 will be obligated. Funds in the amount of $5,183,913 will expire at the end the current fiscal year. Strategic Systems Programs, Washington, District of Columbia, is the contracting activity.