Portsmouth Naval Shipyard
Defense and Space ManufacturingMaine, United States1001-5000 Employees
Portsmouth Naval Shipyard is a defense-focused facility based in Kittery, Maine, that specializes in the safe overhaul, repair, and modernization of the U.S. Navy's nuclear-powered attack submarine fleet. Its work centers on Los Angeles-class and Virginia-class submarines, reflecting a highly specialized naval maintenance capability. The organization maintains an online presence at navsea.navy.mil, aligning with its role within the Navy's organizational structure. The shipyard serves the U.S. Navy as its primary customer, delivering maintenance services that support submarine readiness and safety. As a sizable operation, it supports complex submarine programs with a substantial workforce.