Engineering Services

Engineering design and consulting services, including software and systems engineering.

NAICS 541330 · Sector 54: Professional, Scientific, and Technical Services

By Outrider Editorial Team · Updated October 7, 2026

SBA size standard

$25.5 million

Measured by average annual receipts over the last 5 fiscal years

Exceptions

Military and Aerospace Equipment and Military Weapons
$47 million
Contracts and Subcontracts for Engineering Services Awarded Under the National Energy Policy Act of 1992
$47 million
Marine Engineering and Naval Architecture
$47 million

The solicitation names the standard that applies.

SBA table effective March 2023

FY2025 federal spending

The Department of Defense bought 77% of the $52.3B obligated under 541330 in FY2025.

Contract awards
34,421
Contract vehicles (IDVs)
8,014

Top buying agencies

  1. Department of Defense$40.1B
  2. General Services Administration$5.2B
  3. Department of Transportation$1.7B
  4. Department of Homeland Security$1.4B
  5. National Aeronautics and Space Administration$1.2B

FY2025 federal contract obligations, USAspending.gov

Engineering Services (NAICS 541330) covers engineering consulting, design, and analysis work. While this code includes traditional civil and mechanical engineering, it also encompasses software engineering, systems engineering, and engineering analysis relevant to federal contracting. Many tech companies use 541330 as a secondary code for engineering-intensive projects.

What Businesses Fall Under This Code

541330 includes engineering consulting firms, engineering design companies, and engineering analysis firms. For tech companies, this applies to software engineering consulting, systems engineering, engineering analysis of technology systems, and technology infrastructure engineering. This code is broader than IT services and captures technology work with engineering focus.

SBA Size Standard and What It Means

The SBA size standard for 541330 is $25.5 million in average annual receipts. With average annual receipts of $25.5 million or less, you count as a small business on contracts filed under this code. Some work under this code has its own standard: Military and Aerospace Equipment and Military Weapons ($47 million); Contracts and Subcontracts for Engineering Services Awarded Under the National Energy Policy Act of 1992 ($47 million); Marine Engineering and Naval Architecture ($47 million).

Federal Spending in This Category

Federal engineering services spending exceeds $40 billion annually across all disciplines. Technology-specific engineering (software engineering, systems engineering) represents a growing portion of this category.

Top Agencies Buying in This Code

The Department of Defense, NASA, Department of Energy, National Institutes of Health, and the Federal Aviation Administration are top spenders in engineering services. DoD particularly values engineering consulting for weapons systems, cyber engineering, and defense infrastructure.

Tips for Tech Companies Using This Code

Register for 541330 if your company provides engineering consulting or design services with a technology focus. This code is valuable for aerospace/defense contractors, companies providing systems engineering for federal projects, and technology consultancies with engineering focus. Show demonstrated expertise in federal engineering standards and processes.

Pro Tip: If you do both IT and engineering work, register both codes. Each solicitation names one code, and that code's standard is the one that counts.

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