Possible NAICS Codes
541330 – Engineering Services
541310 – Architectural Services
236220 – Commercial and Institutional Building Construction
237990 – Other Heavy and Civil Engineering Construction
541370 – Surveying and Mapping (except Geophysical) Services
488210 – Support Activities for Rail Transportation
238910 – Site Preparation Contractors
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)