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General Dynamics subsidiary lands $15.4B submarine modification
Navy contract modification is for work on Columbia-class submarines
Rendering of Columbia-class intercontinental ballistic missile submarines for the U.S. Navy. Photo courtesy General Dynamics
Rendering of Columbia-class intercontinental ballistic missile submarines for the U.S. Navy. Photo courtesy General Dynamics
General Dynamics subsidiary lands $15.4B submarine modification
Navy contract modification is for work on Columbia-class submarines
General Dynamics Electric Boat, the Connecticut subsidiary of Reston-based Fortune 500 defense contractor General Dynamics, has received a $15.38 billion Navy contract modification for work on Columbia-class submarines.
The Department of Defense announced the contract award Wednesday. It supports the Navy’s production of Columbia-class ballistic missile submarines, which are designed to replace the Ohio-class ballistic missile submarine fleet.
Under the cost-plus-incentive-fee and cost-plus-fixed-fee modification from the Naval Sea Systems Command in Washington, D.C., General Dynamics Electric Boat will perform additional Columbia-class ballistic missile submarines design, class lead yard support and sustainment, integrated enterprise plan initiatives and submarine industrial base supplier development efforts.
Work is expected to be completed by June 2035 and will be performed in Groton, Connecticut; Newport News; Sunnyvale, California; Menomonee, Wisconsin; Quonset Point, Rhode Island; Fitchburg, Massachusetts; Philadelphia; Mobile, Alabama; Bethlehem, Pennsylvania, and other locations.
The Navy first awarded the Columbia-class ballistic missile submarine contract in 2017: $5 billion to complete design work for the new ballistic missile submarines and to develop components and technologies as well as missile tube module and reactor compartment bulkhead prototyping and manufacturing efforts.
The contract has been expanded multiple times since then, including several multibillion-dollar modifications in more recent years. In 2020, the Navy added a $9.7 billion modification to fund construction and testing of the two Columbia-class submarines, SSBN 826 and SSBN 827. Another modification in December 2022 provided $5.13 billion for advance procurement and early construction of critical components and materials needed for five additional Columbia-class boats. Then, in November 2025, the Navy awarded General Dynamics Electric Boat a $2.28 billion modification.
General Dynamics Electric Boat has more than 24,000 employees. General Dynamics has more than 110,000 employees worldwide and reported $52.6 billion in 2025 revenue.
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