North American Industry Classification System codes:

233310 Manufacturing and industrial building construction
233320 Commercial and industrial building construction
541330 Engineering services
541340 Drafting services
541350 Building inspection services
541512 Computer systems design services
541611 Administrative management and general management              consulting services
541620 Environmental consulting services
541690 Other scientific and technical consulting services
541710 Research and development in the physical,                              engineering, and life sciences
561210 Facility support
561320 Temporary staffing services
562910 Remediation services