NAICS CODES

334290 – Other Communications Equipment Manufacturing

541511 – Computer Systems Design and Related Services 

541512 – Computer Systems Design Services 

541513 – Computer Facilities Management Services 

541519 – Other Computer Related Services

541611 – Administrative Management and General Management Consulting Services 

541612 – Human Resources Consulting Services 

541690 – Other Scientific and Technical Consulting Services 

541990 – All Other Professional, Scientific, and Technical Services 

561110 – Office Administrative Services

236210 – Industrial Building Construction 

236220 – Commercial and Institutional Building Construction 

238210 – Electrical Contractors and Other Wiring Installation Contractors 

238220 – Plumbing, Heating, and Air-Conditioning Contractors 

334290 – Other Communications Equipment Manufacturing

541330 – Engineering Services 

561210 – Facilities Support Services

561320 – Temporary Help Services ​

561621 – Security Systems Services (except Locksmiths) 

561790 – Other Services to Building and Dwellings 

811219 – Other Electronic and Precision Equipment Repair and Maintenance 

922160 – Fire Protection

238990 – All Other Specialty Trade Contractors 

541380 – Testing Laboratories 

238990 – All Other Specialty Trade Contractors