This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Possible NAICS Codes
541310 – Architectural Services
541330 – Engineering Services
236220 – Commercial and Institutional Building Construction
238390 – Other Building Finishing Contractors
541370 – Surveying and Mapping (except Geophysical) Services
561210 – Facilities Support Services