National Steel And Shipbuilding Company

National Steel And Shipbuilding Company, doing business as Nassco, is a General Dynamics subsidiary based in San Diego that operates as a prime contractor for naval ship construction, ship repair, and modernization services to the Department of the Navy, competing exclusively in full-and-open procurement with no set-aside designations. Nassco has executed 1,920 awards worth $30.56 billion in combined potential value, nearly all of them to the Naval Sea Systems Command (NAVSEA), with 91% of potential value already obligated.

Nassco's capability portfolio centers on surface and amphibious ship construction, maintenance, repair, and modernization. Representative construction work includes a $6.78 billion fixed-price incentive block buy awarded September 2024 for T-AO 214–221 and T-AO 215 (supply class tanker ships, DDC) under NAVSEA contract N00024-24-C-4535 with completion through January 2036, and a $131.4 million sole-source definitive contract awarded April 2022 for AS(X) concept refinement, preliminary design, and design maturation supporting the next-generation submarine tender program, extending through January 2027. Maintenance and modernization work spans selected restricted availability (SRA), docking selected restricted availability (DSRA), continuous maintenance availability (CMAV), and Chief of Naval Operations (CNO) availabilities. Recent examples include a $222.3 million DSRA on USS America (LHA-6) awarded May 2025 with completion through September 2027 under definitive contract N00024-25-C-4551; a $98.4 million SRA on USS Harpers Ferry (LSD-49) awarded March 2025; a $95.96 million SRA on USS Harpers Ferry awarded March 2025; and $23.6 million and $19.8 million incremental delivery orders in June 2026 for USS Fitzgerald (DDG-62) and USS Lenah H. Sutcliffe Higbee (DDG-123) under the Complex and Non-Complex Maintenance on Surface Combatant and Amphibious Class Ships - San Diego IDIQ.

Customer concentration is total: NAVSEA represents 199 awards and $30.06 billion of combined potential value (98% of portfolio); the US Pacific Fleet Forces, US Coast Guard, and NOAA account for the remainder. Nassco holds three active IDIQs under NAVSEA: the Littoral Combat Ships Class Sustainment Execution Contract - West Coast Part III (awarded May 2025, $2.65 billion ceiling through May 2030) supporting maintenance, repair, and modernization of non-nuclear surface ships homeported in San Diego with multiple-award MAC I, MAC II, and small-business MAC III delivery tracks; the Complex and Non-Complex Maintenance on Surface Combatant and Amphibious Class Ships - San Diego IDIQ (awarded November 2021, $654.8 million ceiling through November 2026, now expired) for CNO availabilities on surface combatants; and a second Complex and Non-Complex Maintenance IDIQ for amphibious ships (awarded November 2021, $538.5 million ceiling through November 2026, now expired). Additional legacy parent vehicles include Basic Ordering Agreements N0002485H8192 (246 task orders) and indefinite delivery contracts N0002483C2094 (171 task orders), N0002482C2287 (132 task orders), and N0002483C8532 (69 task orders), collectively carrying hundreds of maintenance and repair task orders.

Activity has slowed in recent years—five awards in 2022, six in 2023, one in 2024, eight in 2025, and five to date in 2026—reflecting the episodic nature of large ship construction and availability scheduling. Nine awards with combined potential value of $8.41 billion reach ultimate completion within the next twenty-four months and face recompete exposure. Top NAICS categories are Ship Building and Repairing (445 awards) and Engineering Services (1 award); top PSC codes are Non-Nuclear Ship Repair (West) (667 awards), Maintenance/Repair/Rebuild of Equipment - Ships (564 awards), and Modification of Equipment - Ships (315 awards). Nassco subcontracts extensively across repair trades and industrial support: Propulsion Controls Engineering (small business, San Diego-based maritime repair), Tecnico Corporation (small business, ship repair and modernization), Fairbanks Morse (marine propulsion systems), Imia LLC (surface preparation and painting), South Bay Sand Blasting And Tank Cleaning Inc. (minority-owned Hispanic American small business, surface preparation), Quality Refrigeration Company Inc. (small business, HVAC), Brewer Crane LLC (small disadvantaged business, crane and rigging), Coastal Marine Services Inc. (small business, maritime industrial services), and specialty vendors including Epsilon Systems Solutions Inc., Alfa Laval Inc., and surface preparation and coating specialists. Nassco received a $1.136 million Project Grant from NAVSEA under the Improvement of Navy Ship Repair or Alterations Capability Program (CFDA 12.031) on August 2025 extending through December 2026 to fund workforce development, equipment acquisition, and operational improvements at its San Diego shipyard.