NAICS 336611: Ship Building and Repairing

NAICS 336611 – Ship Building and Repairing encompasses the design, construction, renovation, maintenance, and overhaul of naval vessels, commercial ships, and specialized maritime platforms, including hull fabrication, propulsion system integration, electrical and command systems installation, and corrosion control. This sector supports critical national defense and homeland security infrastructure, with work ranging from new-build warships to mid-life upgrades of Coast Guard cutters and auxiliary vessels. The industry demands high-precision engineering, compliance with naval specifications such as MIL-STD and ABS standards, and specialized facilities capable of dry-docking and heavy-lift operations. It plays a foundational role in maintaining maritime domain awareness, force projection, and logistical readiness across federal fleets. Top contractors in this space include B3H CORPORATION, BHPE LLC, GWO, INC., SCRIBEDOC.COM, INC., TECH O. R., LLC, EVERSTONE INDUSTRIES LLC, ALASKA RUBBER GROUP, INC., and HIGH PLAINS COMPUTING INC. These firms span small businesses and mid-tier vendors, with expertise in niche areas such as marine coatings, digital documentation systems, electronic component refurbishment, and logistics support for shipyard operations. The competitive landscape is fragmented, with many contractors specializing in supply chain support rather than full vessel construction, reflecting a growing reliance on subcontracted services for maintenance and modernization. The Department of Defense and the Department of Homeland Security are the primary procuring agencies, driving demand through fleet sustainment programs, vessel modernization initiatives, and Coast Guard asset renewal efforts. Spending is concentrated on repair cycles, system upgrades, and compliance with evolving environmental and safety regulations. The market offers consistent opportunity density for specialized service providers, particularly those with Navy or Coast Guard certifications and experience in dry-dock operations, marine electrical systems, and naval-grade materials. Demand is increasingly tied to lifecycle extension programs and resilience-focused retrofits, creating openings for agile, certified small businesses in support roles.