NAICS Code 541330: Engineering Services
National industry
SBA small business size standard: $25.5 million in average annual receipts
Definition
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.
Government contracts for this service: PSC R425 Engineering and Technical Services
Code facts
- Part of
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54
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541
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5413
- 54133
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5413
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541
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54
- Contract awards
- 6,215 In the last 12 months
- Contract obligations
- $52,805,871,873 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 541330
- Acoustical engineering consulting services
- Acoustical system engineering design services
- Boat engineering design services
- Chemical engineering services
- Civil engineering services
- Combustion engineering consulting services
- Construction engineering services
- Consulting engineers' offices
- Consulting engineers' private practices
- Electrical engineering services
- Engineering consulting services
- Engineering design services
- Engineering services
- Engineers' offices
- Engineers' private practices
- Environmental engineering services
- Erosion control engineering services
- Geological engineering services
- Geophysical engineering services
- Heating engineering consulting services
- Industrial engineering services
- Logging engineering services
- Marine engineering services
- Mechanical engineering services
- Mining engineering services
- Petroleum engineering services
- Traffic engineering consulting services
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $285,105,365 |
| FY2026 | $45,196,595,395 |
| FY2025 | $52,805,871,873 |
| FY2024 | $53,370,796,951 |
| FY2023 | $48,530,149,444 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Electric Boat Corporation | $7,644,539,176 | |
| 2 | Booz Allen Hamilton Inc. | $1,438,183,597 | |
| 3 | Science Applications International Corporation | $1,428,380,679 | |
| 4 | Caci, Inc. - Federal | $793,538,151 | |
| 5 | BAE Systems Technology Solutions & Services Inc. | $769,944,624 | |
| 6 | General Dynamics Information Technology, Inc. | $598,149,948 | |
| 7 | Ameresco Inc. | $583,661,002 | |
| 8 | The Charles Stark Draper Laboratory, Inc. | $568,263,645 | |
| 9 | General Dynamics Mission Systems, Inc. | $558,652,319 | |
| 10 | HII Mission Technologies Corp | $537,407,784 |
See the full FY2025 ranking of NAICS 541330 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Navy | $21,689,546,341 | |
| 2 | Air Force | $7,796,505,572 | |
| 3 | Department of the Army | $6,500,008,257 | |
| 4 | Department of Homeland Security | $1,974,453,523 | |
| 5 | Department of Transportation | $1,823,685,883 | |
| 6 | Office of the Secretary of Defense | $881,564,927 | |
| 7 | Department of Veterans Affairs | $816,638,817 | |
| 8 | Department of Energy | $676,830,090 | |
| 9 | National Aeronautics and Space Administration | $612,485,940 | |
| 10 | Department of Health and Human Services | $285,197,925 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | R425 Engineering and Technical Services | $12,852,020,689 | |
| 2 | 1905 Combat Ships and Landing Vessels | $7,665,065,737 | |
| 3 | R499 Other Professional Services | $5,420,771,561 | |
| 4 |
R408 Program Management/ |
$2,208,217,501 | |
| 5 | C219 Other Architect and Engineering Services | $1,587,032,792 | |
| 6 | AC13 National Defense R&D Services; Department of Defense – Military; Experimental Development | $1,063,632,434 | |
| 7 | R706 Logistics Support Services | $612,805,809 | |
| 8 | J014 Maintenance, Repair and Rebuilding of Equipment: Guided Missiles | $595,018,478 | |
| 9 | C211 Architect – Engineer Services (including landscaping, interior layout, and designing) | $520,572,204 | |
| 10 | K016 Modification of Equipment: Aircraft Components and Accessories | $505,356,554 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $8,672,761,992 | |
| 2 | Connecticut | $7,754,535,619 | |
| 3 | Maryland | $3,857,467,498 | |
| 4 | California | $3,448,421,608 | |
| 5 | Florida | $2,162,498,918 | |
| 6 | District of Columbia | $2,118,397,289 | |
| 7 | Massachusetts | $1,975,529,738 | |
| 8 | Alabama | $1,598,628,072 | |
| 9 | Colorado | $974,627,441 | |
| 10 | Texas | $849,703,738 | |
| 11 | Arizona | $830,329,785 | |
| 12 | Georgia | $733,181,411 | |
| 13 | South Carolina | $708,725,295 | |
| 14 | Tennessee | $687,285,534 | |
| 15 | Pennsylvania | $641,947,917 | |
| 16 | Nevada | $560,737,444 | |
| 17 | New Jersey | $526,012,039 | |
| 18 | New York | $424,674,572 | |
| 19 | Hawaii | $413,487,291 | |
| 20 | Missouri | $395,804,951 | |
| 21 | Oklahoma | $390,190,570 | |
| 22 | Indiana | $377,531,444 | |
| 23 | Utah | $338,563,770 | |
| 24 | Rhode Island | $333,719,945 | |
| 25 | North Carolina | $299,604,727 | |
| 26 | New Mexico | $255,959,041 | |
| 27 | Washington | $236,910,630 | |
| 28 | Illinois | $233,272,066 | |
| 29 | Alaska | $199,028,348 | |
| 30 | Michigan | $185,720,461 | |
| 31 | Ohio | $153,994,447 | |
| 32 | West Virginia | $140,647,827 | |
| 33 | Iowa | $113,861,897 | |
| 34 | Guam | $113,766,184 | |
| 35 | Montana | $83,932,272 | |
| 36 | Nebraska | $76,990,200 | |
| 37 | Louisiana | $68,281,238 | |
| 38 | New Hampshire | $67,763,836 | |
| 39 | Idaho | $64,639,039 | |
| 40 | Minnesota | $60,390,564 | |
| 41 | Kentucky | $58,324,046 | |
| 42 | Vermont | $57,911,163 | |
| 43 | Mississippi | $53,654,552 | |
| 44 | Arkansas | $46,572,111 | |
| 45 | Maine | $42,096,259 | |
| 46 | Oregon | $37,339,773 | |
| 47 | Kansas | $36,622,980 | |
| 48 | Wisconsin | $36,207,407 | |
| 49 | Wyoming | $35,592,883 | |
| 50 | Puerto Rico | $34,958,247 | |
| 51 | South Dakota | $17,537,995 | |
| 52 | North Dakota | $16,120,349 | |
| 53 | Delaware | $5,904,964 | |
| 54 | Northern Mariana Islands | $3,538,897 | |
| 55 | U.S. Virgin Islands | $2,114,650 |
Show all 55
Shares are of everything obligated under NAICS 541330 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 39 more
Latest 49 of 48,374 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
Proposed size standard changes
| Proposed rule | Published | Comments |
|---|---|---|
| Small Business Size Standards: Monetary-Based Industry Size Standards | Closed Oct 21, 2025No final rule found |
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 541330?
NAICS 541330 is Engineering Services, a national industry in NAICS 54, Professional, Scientific, and Technical Services.
What is the NAICS code for engineers' offices?
The NAICS code for engineers' offices is 541330, Engineering Services.
What is the NAICS code for engineering services?
The NAICS code for engineering services is 541330, Engineering Services.
What is the NAICS code for civil engineering services?
The NAICS code for civil engineering services is 541330, Engineering Services.
When did the size standard for NAICS 541330 last change?
The most recent Federal Register rule on record that names NAICS 541330 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 541330?
Federal contracts under NAICS 541330 obligated $52,805,871,873 in fiscal year 2025 and $200,188,519,029 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 541330?
The contractors with the most obligated under NAICS 541330 in fiscal years 2026 and 2027 are Electric Boat Corporation ($7,644,539,176), Booz Allen Hamilton Inc. ($1,438,183,597) and Science Applications International Corporation ($1,428,380,679).
Which agencies buy the most under NAICS 541330?
The agencies that obligated the most under NAICS 541330 in fiscal years 2026 and 2027 are Department of the Navy ($21,689,546,341), Air Force ($7,796,505,572) and Department of the Army ($6,500,008,257).
Which PSC codes are used with NAICS 541330?
The PSC codes with the most obligated under NAICS 541330 in fiscal years 2026 and 2027 are R425 Engineering and Technical Services, 1905 Combat Ships and Landing Vessels and R499 Other Professional Services.
Where is the work under NAICS 541330 performed?
By place of performance, the states with the most contract obligations under NAICS 541330 over the last 12 months are Virginia ($8,672,761,992), Connecticut ($7,754,535,619) and Maryland ($3,857,467,498).
What is the latest contract opportunity under NAICS 541330?
The latest contract opportunity under NAICS 541330 is 1 DTA Manage Cloud Services (MCE) Bridge for Managed Support Services, limited / sole source justification from District Washington (HAF), posted November 6, 2026.
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