NAICS 541330: Engineering Services
Small business size standard: $25.5 million average annual receipts (higher for some exceptions)
Covers applying physical laws and engineering principles to design and develop structures, machines, processes, and systems — civil, mechanical, electrical engineering, and engineering studies for government infrastructure and facilities.
What work falls under NAICS 541330
- Civil/structural design for public infrastructure
- Mechanical/electrical/plumbing (MEP) engineering
- Engineering studies, assessments, and inspections
- A&E support under Brooks Act qualifications-based selection
How to win contracts under this code
- Register in SAM.gov with 541330 as a primary or secondary NAICS code, and confirm you're under the size standard for set-aside eligibility.
- Set a SAM.gov saved search for NAICS 541330 filtered to your set-aside types and places of performance.
- Build a capability statement that leads with this code and your most relevant past performance.
- For each solicitation, build a compliance matrix before writing — most losses under this code are compliance losses.
Bidding on a NAICS 541330 solicitation?
Generate your capability statement and compliance matrix free — no account required.
Frequently asked questions
How are engineering services procured federally?
Architect-engineer services are selected under the Brooks Act: qualifications-based selection via SF330 submissions, with price negotiated after selection — not low-bid. Build your SF330 library early.
Can engineering firms also bid construction?
Design firms generally can't construct what they designed on the same project (organizational conflict of interest), but design-build teaming with a constructor is common and allowed when solicited that way.