NAICS 541330:
Engineering Services
This industry comprises 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. The assignments undertaken by these establishments may involve any of the following activities: provision of advice, preparation of feasibility studies, preparation of preliminary and final plans and designs, provision of technical services during the construction or installation phase, inspection and evaluation of engineering projects, and related services.
Civil engineering servicesEnvironmental engineering servicesConstruction engineering services+3 examples
Matching SIC code: 8711 Engineering Services (also 8748 Business Consulting Services, Not Elsewhere Classified)
Where it sits
Largest companies with NAICS 541330
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  Jacobsjacobs.com | Dallas, US | 67K |
| 2 |  AECOMaecom.com | Dallas, US | 62K |
| 3 |  Amentumamentum.com | Chantilly, US | 38K |
| 4 |  Fluor Corporationfluor.com | Irving, US | 37K |
| 5 |  KBR, Inc.kbr.com | Houston, US | 33K |
| 6 |  Koch Engineered Solutionskochengineeredsolutions.com | Wichita, US | 30K |
| 7 |  Tetra Techtetratech.com | Pasadena, US | 27K |
| 8 |  Parsons Corporationparsons.com | Chantilly, US | 21K |
| 9 |  HDRhdrinc.com | Omaha, US | 18K |
| 10 |  Burns & McDonnellburnsmcd.com | Kansas City, US | 17K |
Not this code?
Similar activities the Census classifies elsewhere.
- 541512Computer Systems Design ServicesPlanning and designing computer systems that integrate computer hardware, software, and communication technologies
- 541511Custom Computer Programming ServicesDesigning and writing custom software to meet the needs of a particular customer
- 513210Software PublishersSoftware design, development, and publishing, or software publishing only
- 541420Industrial Design ServicesCreating and developing designs and specifications that optimize the use, value, and appearance of products
Questions about NAICS 541330
Which businesses use NAICS 541330?
What SIC code matches NAICS 541330?
How many companies have NAICS 541330?
Code titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.