NAICS REFERENCE
NAICS 541990: All Other Professional/Sci/Tech
All other professional, scientific, and technical services is a catch-all for specialized professional services not classified in a more specific NAICS code.
DIRECT ANSWER
What is NAICS 541990?
NAICS 541990, All Other Professional/Sci/Tech, is a professional services classification. Contractors can use it to filter relevant federal awards, then check scope, incumbent, agency, timing, and public notices before treating an expiring award as a credible recompete.
REFERENCE
What This Code Covers
All other professional, scientific, and technical services is a catch-all for specialized professional services not classified in a more specific NAICS code.
Use the code as a starting point for scope review. The contract statement of work, buyer office, vehicle, incumbent, and timing still decide whether an opportunity fits.
- Specialized technical services
- Common work pattern for All Other Professional/Sci/Tech.
- Expert advisory support
- Common work pattern for All Other Professional/Sci/Tech.
- Professional services not elsewhere classified
- Common work pattern for All Other Professional/Sci/Tech.
- Program-specific technical support
- Common work pattern for All Other Professional/Sci/Tech.
REFERENCE
What This Code Usually Does Not Cover
Adjacent codes matter because a saved search can miss good work or create noise when the scope is classified differently.
- Adjacent distinction
- Engineering belongs closer to 541330.
- Adjacent distinction
- Testing laboratories belong closer to 541380.
REFERENCE
Federal Contracting Context
Professional services requirements should be reviewed against agency fit, place of performance, incumbent history, set-aside context, and the current award period.
Prime Leads treats NAICS as a filter, not a guarantee. A stronger read pairs the code with contract cliff timing and public procurement motion such as Sources Sought notices or RFIs.
- Why prioritized
- Named in the first Hyperagent NAICS batch as a broad professional services reference lane.
- Demand signal
- Relevant when federal scope language is specialized but does not cleanly fit a narrower professional services code.
- Monitoring note
- Track active awards under this code, then qualify each one with timing evidence and source context.
FAQ
Questions before you act on the signal.
What does NAICS 541990 mean?
It means All Other Professional/Sci/Tech. The code classifies a broad type of work, but the scope and contract documents decide whether it is the right fit.
What kinds of federal contracts use NAICS 541990?
Contracts that primarily match professional services work may use this code, especially when the scope includes specialized technical services or expert advisory support.
How can I monitor recompetes for NAICS 541990?
Track active awards in the code, watch period-of-performance cliffs, compare incumbent and scope history, and look for Sources Sought, RFI, forecast, or modification signals.