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541330

NAICS Code Guide

Engineering Services

Professional, Scientific, and Technical Services · SBA Size Standard: $25.5M · ~60,000 registered entities

NAICS 541330 is the broadest engineering services code — covering civil, mechanical, electrical, systems, and environmental engineering for federal programs.

About NAICS 541330

NAICS 541330 covers establishments primarily engaged in applying physical laws and principles of engineering in the design, development, and utilization of machines, materials, instruments, structures, processes, and systems. In federal contracting, this is a massive code spanning civil engineering for infrastructure, mechanical engineering for military equipment, electrical engineering for weapons systems, systems engineering for DoD programs, and environmental engineering for remediation projects. DoD, DOE, Army Corps of Engineers, and NASA are the largest buyers.

541330

NAICS Code

$25.5M

SBA Size Standard

60,000

Registered Entities

Applicable Set-Aside Programs

Small Business 8(a) SDVOSB HUBZone

Companies that qualify under NAICS 541330 and hold applicable SBA certifications can compete for set-aside contracts reserved for these programs. Certifications are linked to your CAGE code record in SAM.gov.

Learn about set-aside programs →

Top Federal Buyers Under NAICS 541330

Army Corps DoD DOE NASA DOT EPA

These agencies award the most contract dollars under this NAICS code. See full award data on FedAtlas.com.

Engineering Specializations Under NAICS 541330

541330 covers a wide range of engineering disciplines:

  • Civil and structural engineering — bridges, buildings, water infrastructure
  • Mechanical engineering — HVAC, machinery, manufacturing support
  • Electrical/electronic engineering — power systems, control systems
  • Systems engineering — DoD acquisition program support (SEMP, CDRs, PDRs)
  • Environmental engineering — CERCLA remediation, environmental compliance
  • Chemical engineering — process design, hazardous materials

SBA Size Standard for NAICS 541330

The SBA size standard for NAICS 541330 is $25.5 million in average annual receipts (with exceptions — DoD manufacturing engineering exemptions may apply under specific PSC codes).

Look Up a NAICS 541330 Vendor

Decode any CAGE code to verify a vendor's primary NAICS code, SAM status, and certifications.

Frequently Asked Questions

Is systems engineering (SEMP support) covered under 541330?

Yes. DoD systems engineering support — including technical baseline management, CDR/PDR support, and SEMP development — is typically awarded under 541330 or 541715.

What is the A-E (Architect-Engineer) contracting process?

Federal construction and engineering services over $25,000 are often competed under the Brooks Act using the QBS (qualifications-based selection) process. A-E firms must be pre-qualified and submit SF 330 forms. The contracting vehicle is separate from standard SAM.gov CAGE code lookup but the CAGE code is still required.

Contract Award Data

NAICS 541330 Awards on FedAtlas.com

See every federal contract won under NAICS 541330 — by company, agency, state, and year.

View on FedAtlas

NAICS 541330 Quick Facts

Code
541330
Sector
Professional, Scientific, and Technical Services
SBA Size Standard
$25.5M
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