236210 - Industrial Building Construction 

236220 - Commercial and Institutional Building Construction 

237110 - Water and Sewer Line and Related Structures Construction 

237130 - Power and Communication Line and Related Structures Construction 

237310 - Highway, Street, and Bridge Construction 

237990 - Other Heavy and Civil Engineering Construction 

238140 - Masonry Contractors 

238190 - Other Foundation, Structure, and Building Exterior Contractors 

238210 - Electrical Contractors and Other Wiring Installation Contractors

238220 - Plumbing, Heating, and Air-Conditioning Contractors 

238290 - Other Building Equipment Contractors 

238330 - Flooring Contractors

238910 - Site Preparation Contractors

561210 - Facilities Support Services

561621 - Security Systems Services (except Locksmiths) 

561730 - Landscaping Services

562910 - Remediation Services 

624230 - Emergency and Other Relief Services 

923140 - Administration of Veterans' Affairs 

North American Industry Classification System (NAICS)

NAICS Exception

237990 - Other Heavy and Civil Engineering Construction 

562910 - Remediation Services 

North American Industry Classification System (NAICS)