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
541690 – Other Scientific and Technical Consulting Services
541620 – Environmental Consulting Services
621399 – Offices of All Other Miscellaneous Health Practitioners
541990 – All Other Professional, Scientific, and Technical Services
541490 – Other Specialized Design Services
561990 – All Other Support Services