221310

Water Supply and Irrigation Systems

238210

Electrical Contractors and Other Wiring Installation Contractors

238220

Plumbing, Heating, and Air-Conditioning Contractors

323120

Support Activities for Printing

541310

Architectural Services

541330

Engineering Services
General $15.00m Small Business Size Standard: [Yes]
Special $38.50m Military and Aerospace Equipment and Military Weapons: [Yes]
Special $38.50m Contracts and Subcontracts for Engineering Services Awarded Under the National Energy Policy Act of 1992: [Yes]
Special $38.50m Marine Engineering and Naval Architecture: [Yes] ⁽⁴⁾

541340

Drafting Services

541350

Building Inspection Services

541380

Testing Laboratories

541420

Industrial Design Services

541611

Administrative Management and General Management Consulting Services

541690

Other Scientific and Technical Consulting Services

541715

Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
General 1000 Employees Small Business Size Standard: [Yes]
Special 1500 Employees Aircraft, Aircraft Engine and Engine Parts: [Yes]
Special 1250 Employees Other Aircraft Parts and Auxiliary Equipment: [Yes]
Special 1250 Employees Guided Missiles and Space Vehicles, Their Propulsion Units and Propulsion Parts: [Yes] ⁽⁴⁾

541990

All Other Professional, Scientific, and Technical Services

561210

Facilities Support Services

561621

Security Systems Services (except Locksmiths)

561910

Packaging and Labeling Services

611430

Professional and Management Development Training

611513

Apprenticeship Training

611519

Other Technical and Trade Schools

611699

All Other Miscellaneous Schools and Instruction