What is NAICS code 541990?

NAICS 541990 is the industry "All Other Professional, Scientific, and Technical Services" in the North American Industry Classification System, part of the Professional, Scientific, and Technical Services sector (54).

What is the size standard for NAICS 541990?

The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 541990 in the SBA table of size standards on sba.gov; it changes from time to time.

NAICS Code 541990: All Other Professional, Scientific, and Technical Services

NAICS code 541990 is the industry for all other professional, scientific, and technical services in the Professional, Scientific, and Technical Services sector. Agencies tag every federal contract with a NAICS code, so this is the code to list in your SAM.gov registration and to search for bids.

Government contracts under NAICS 541990

Federal agencies obligated $37.9B on contracts under NAICS 541990 from FY2024 to FY2026, including $11.8B in FY2026. The biggest buyers were the Department of Defense, the Department of Energy, the Agency for International Development. The largest contractors were Battelle Energy Alliance, LLC, Sierra Nevada Company, LLC, Booz Allen Hamilton Inc.

See the full breakdown: government all other professional, scientific, and technical services contracts, who wins and who buys.

Open government bids for NAICS 541990

The newest open notices from SAM.gov. Bidding needs a free SAM.gov registration.

Fort Campbell, KY - API 653 External Tank Inspection
Dept of Defense · Solicitation · NAICS 541990 · Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside (FAR 19.14)
Posted Oct 29, 2026 · Responses due Nov 13, 2026
Cleaning, Inspection, and Hazardous Waste Removal for Two 10,000-Gallon Oil/Water Separators
Dept of Defense · Combined Synopsis/Solicitation · NAICS 541990 · MN · Small Business Set Aside - Total
Posted Oct 29, 2026 · Responses due Nov 12, 2026
Artifact Conservation Project Coordinator
National Archives and Records Administration · Solicitation · NAICS 541990 · MD · Small Business Set Aside - Total
Posted Oct 29, 2026 · Responses due Nov 12, 2026

See all 3 open bids under NAICS 541990

Small business size standard for NAICS 541990

To bid on small business set-aside contracts under NAICS 541990, your business must be small under the SBA size standard for this code, measured either by average annual receipts or by number of employees. The values are updated periodically, so check the current SBA table of size standards before you bid.

Other NAICS codes in 5419

How to choose the right NAICS code

Pick the 6-digit code that best describes what you sell. List it as your primary code in SAM.gov, and add other codes for related work. Agencies choose one NAICS code for each contract, so check the codes on past awards for the kind of work you do. Search all codes in the NAICS code lookup.

Related guides

Frequently asked questions

What is NAICS code 541990?: NAICS 541990 is the industry "All Other Professional, Scientific, and Technical Services" in the North American Industry Classification System, part of the Professional, Scientific, and Technical Services sector (54).
What is the size standard for NAICS 541990?: The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 541990 in the SBA table of size standards on sba.gov; it changes from time to time.
Are there government contracts for NAICS 541990?: Yes. Federal agencies obligated $37.9B on contracts under NAICS 541990 from FY2024 to FY2026, and 3 notices are open right now.