Construction & Infrastructure

236210 – Industrial Building Construction – Factories, hangars, and specialized government facilities
236220 – Commercial and Institutional Building Construction – Federal offices, base housing, and command centers
237110 – Water and Sewer Line and Related Structures Construction – Water systems and utility installation
237120 – Oil and Gas Pipeline and Related Structures Construction – Fuel pipelines for military or coastal bases
237130 – Power and Communication Line Construction – Electrical, fiber, and power grid projects
237310 – Highway, Street, and Bridge Construction – Access roads and base transportation routes
237990 – Other Heavy and Civil Engineering Construction – Docks, piers, levees, and breakwaters
238110 – Poured Concrete Foundation and Structure Contractors – Concrete for infrastructure and foundations
238120 – Structural Steel and Precast Concrete Contractors – Steel framing and precast installations
238160 – Roofing Contractors – Roofing repair or replacement for federal facilities
238210 – Electrical Contractors – Power systems and wiring for installations
238220 – Plumbing, Heating, and Air-Conditioning Contractors – HVAC and mechanical services
238910 – Site Preparation Contractors – Grading, demolition, and land clearing
238990 – All Other Specialty Trade Contractors – General construction trades for support facilities

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Shipbuilding & Maritime

336611 – Ship Building and Repairing – Naval and Coast Guard vessels, drydock services
336612 – Boat Building – Small craft, patrol boats, and support vessels
332996 – Fabricated Pipe and Pipe Fitting Manufacturing – Piping systems for ships and shipyards
332911 – Industrial Valve Manufacturing – Shipboard valve and flow systems
333611 – Turbine and Turbine Engine Manufacturing – Marine propulsion engines and turbines
335312 – Motor and Generator Manufacturing – Ship power generation systems
325510 – Paint and Coating Manufacturing – Marine coatings and corrosion prevention
811310 – Commercial and Industrial Machinery Repair – Shipyard machine and equipment maintenance
488330 – Navigational Services to Shipping – Pilotage, tug operations, and harbor coordination

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Aerospace & Aviation

336411 – Aircraft Manufacturing – Fixed-wing and rotary aircraft
336412 – Aircraft Engine and Engine Parts Manufacturing – Turbine and propulsion systems
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing – Components, landing gear, systems
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical Systems – Avionics and radar
334515 – Instrument Manufacturing for Measuring and Testing Electricity – Avionics testing equipment
488190 – Other Support Activities for Air Transportation – MRO and airfield operations
611512 – Flight Training – Pilot and UAV operator training programs

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IT, Cybersecurity, AI & Communications

511210 – Software Publishers – Secure and commercial software solutions
518210 – Data Processing, Hosting, and Related Services – Cloud, hosting, and server operations
541511 – Custom Computer Programming Services – Software and system development
541512 – Computer Systems Design Services – Systems integration for command and control
541513 – Computer Facilities Management Services – Network and infrastructure management
541519 – Other Computer Related Services – Technical and security system support
334220 – Radio and Wireless Communications Equipment Manufacturing – Secure communications hardware
517810 – All Other Telecommunications – Network services and data transmission
517919 – Other Telecommunications Support Services – Satellite and defense communications support

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Logistics & Transportation

484110 – General Freight Trucking, Local – Base-to-base material transport
484121 – General Freight Trucking, Long-Distance, Truckload – Long-haul defense freight
484230 – Specialized Freight Trucking, Long-Distance – Heavy and sensitive equipment hauling
488310 – Port and Harbor Operations – Dock, loading, and terminal management
488320 – Marine Cargo Handling – Loading and unloading vessels
488510 – Freight Transportation Arrangement – Logistics coordination and freight forwarding
493110 – General Warehousing and Storage – Storage and material distribution
493120 – Refrigerated Warehousing and Storage – Temperature-sensitive goods storage
541614 – Process, Physical Distribution, and Logistics Consulting – Supply chain and distribution planning

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Staffing & Workforce Support

561110 – Office Administrative Services – Back-office and administrative staffing
561210 – Facilities Support Services – Base and installation management contracts
561311 – Employment Placement Agencies – Labor recruitment and placement
561320 – Temporary Help Services – Skilled and temporary staffing
561330 – Professional Employer Organizations – Contract workforce management
561612 – Security Guards and Patrol Services – Security and access control for bases
561499 – All Other Business Support Services – Scheduling, logistics, and clerical assistance

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Engineering, Research & Development

541330 – Engineering Services – Civil, mechanical, and defense systems engineering
541380 – Testing Laboratories – Product, material, and system testing
541715 – Research and Development in Physical, Engineering, and Life Sciences – Defense and aerospace R&D
541690 – Other Scientific and Technical Consulting Services – Technical analysis and design consulting

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Manufacturing & Materials Supply

332312 – Fabricated Structural Metal Manufacturing – Structural metal parts for facilities
332721 – Precision Turned Product Manufacturing – Fasteners and small components
332999 – Miscellaneous Fabricated Metal Product Manufacturing – Custom equipment and parts
333611 – Turbine and Turbine Engine Manufacturing – Industrial turbine equipment
333914 – Measuring, Dispensing, and Pumping Equipment Manufacturing – Fluid and fuel systems
335999 – Other Miscellaneous Electrical Equipment Manufacturing – Custom electrical assemblies

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Energy & Power Systems

221122 – Electric Power Distribution – Energy transmission and facility grids
335311 – Power, Distribution, and Specialty Transformer Manufacturing – Power equipment
335312 – Motor and Generator Manufacturing – Power systems and backup units
333611 – Turbine and Turbine Engine Manufacturing – Energy and power generation
811310 – Equipment Repair and Maintenance – Power system service and maintenance

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Environmental & Facility Services

562111 – Solid Waste Collection – Base and port waste management
562112 – Hazardous Waste Collection – Hazardous material transport and disposal
562910 – Remediation Services – Environmental cleanup and restoration
541620 – Environmental Consulting Services – Compliance, sustainability, and site assessment

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Disaster Services

562119 – Other Waste Collection – Post-disaster debris removal
561790 – Other Services to Buildings and Dwellings – Cleanup, repair, and recovery
624230 – Emergency and Other Relief Services – Disaster response, shelter, and relief operations

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Medical & Health Services

621111 – Offices of Physicians (except Mental Health) – On-base and field medical care
621493 – Freestanding Ambulatory Surgical and Emergency Centers – Emergency or mobile medical facilities
621999 – Miscellaneous Ambulatory Health Care Services – Occupational and on-site medical services
621910 – Ambulance Services – Medical transport for federal installations
541612 – Human Resources Consulting Services – Retained here for medical staffing and wellness programs