NAICS Subsector 541: Professional, Scientific, and Technical Services
Subsector
Definition
Industries in the Professional, Scientific, and Technical Services subsector group establishments engaged in processes where human capital is the major input. These establishments make available the knowledge and skills of their employees, often on an assignment basis, where an individual or team is responsible for the delivery of services to the client. The individual industries of this subsector are defined on the basis of the particular expertise and training of the services provider.
The distinguishing feature of the Professional, Scientific, and Technical Services subsector is the fact that most of the industries grouped in it have production processes that are almost wholly dependent on worker skills. Thus, the establishments classified in this subsector sell expertise. Much of the expertise requires degrees, though not in every case.
Code facts
- Part of
-
- 54
- Codes under it
- 9
- Contract awards
- 56,121 In the last 12 months
- Contract obligations
- $221,627,380,724 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $2,822,392,793 |
| FY2026 | $207,943,551,997 |
| FY2025 | $221,627,380,724 |
| FY2024 | $234,728,703,588 |
| FY2023 | $229,609,832,202 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Electric Boat Corporation | $7,642,201,622 | |
| 2 | Booz Allen Hamilton Inc. | $6,027,852,870 | |
| 3 | General Dynamics Information Technology, Inc. | $4,104,150,542 | |
| 4 | Science Applications International Corporation | $3,633,096,138 | |
| 5 | Fluor Marine Propulsion, LLC | $3,594,734,943 | |
| 6 | Accenture Federal Services LLC | $3,478,572,722 | |
| 7 | Deloitte Consulting LLP | $3,202,060,792 | |
| 8 | Caci, Inc. - Federal | $3,035,811,436 | |
| 9 | Battelle Energy Alliance, LLC | $2,497,188,747 | |
| 10 | The Johns Hopkins University Applied Physics Laboratory LLC | $2,307,750,125 |
See the full FY2025 ranking of NAICS 541 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Navy | $36,209,318,204 | |
| 2 | Air Force | $31,784,764,670 | |
| 3 | Department of the Army | $23,883,561,831 | |
| 4 | Department of Health and Human Services | $17,077,393,347 | |
| 5 | Department of Homeland Security | $15,163,151,256 | |
| 6 | Department of Energy | $11,152,655,951 | |
| 7 | Department of Veterans Affairs | $10,975,127,521 | |
| 8 | National Aeronautics and Space Administration | $8,228,701,584 | |
| 9 | Office of the Secretary of Defense | $6,201,317,019 | |
| 10 | Missile Defense Agency | $5,952,609,225 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | R425 Engineering and Technical Services | $23,096,786,257 | |
| 2 |
DA01 IT and Telecom – Business Application/ |
$20,266,532,886 | |
| 3 | R499 Other Professional Services | $19,294,527,356 | |
| 4 | 1905 Combat Ships and Landing Vessels | $7,679,849,176 | |
| 5 |
R408 Program Management/ |
$7,649,200,599 | |
| 6 | AC13 National Defense R&D Services; Department of Defense – Military; Experimental Development | $7,449,627,784 | |
| 7 |
DA10 IT and Telecom – Business Application/ |
$6,959,222,367 | |
| 8 | AC32 National Defense R&D Services; Defense-Related Activities; Applied Research | $6,573,536,550 | |
| 9 | DF01 IT and Telecom – IT Management Support Services (Labor) | $4,785,264,094 | |
| 10 | R706 Logistics Support Services | $4,777,934,012 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $53,980,473,800 | |
| 2 | Maryland | $22,632,807,259 | |
| 3 | California | $17,276,819,257 | |
| 4 | District of Columbia | $17,019,949,198 | |
| 5 | Alabama | $8,223,738,726 | |
| 6 | Texas | $8,173,722,466 | |
| 7 | Connecticut | $8,087,351,269 | |
| 8 | Colorado | $6,572,137,339 | |
| 9 | Massachusetts | $6,454,397,148 | |
| 10 | Pennsylvania | $5,906,996,196 | |
| 11 | Florida | $5,778,341,093 | |
| 12 | New Jersey | $4,464,015,642 | |
| 13 | Arizona | $3,811,004,432 | |
| 14 | New York | $3,179,036,248 | |
| 15 | Ohio | $2,951,222,455 | |
| 16 | Georgia | $2,819,515,536 | |
| 17 | Idaho | $2,591,146,126 | |
| 18 | Illinois | $2,389,217,954 | |
| 19 | Kansas | $2,165,469,869 | |
| 20 | North Carolina | $2,009,457,554 | |
| 21 | South Carolina | $1,774,465,351 | |
| 22 | Tennessee | $1,270,406,122 | |
| 23 | Indiana | $1,081,720,008 | |
| 24 | Utah | $1,056,533,362 | |
| 25 | Missouri | $1,050,131,081 | |
| 26 | Oklahoma | $997,069,240 | |
| 27 | Hawaii | $982,588,563 | |
| 28 | New Mexico | $924,971,084 | |
| 29 | West Virginia | $777,552,647 | |
| 30 | Nevada | $764,747,015 | |
| 31 | Alaska | $689,614,967 | |
| 32 | Washington | $676,291,802 | |
| 33 | Michigan | $656,794,426 | |
| 34 | Nebraska | $562,265,206 | |
| 35 | Rhode Island | $490,895,165 | |
| 36 | Mississippi | $469,528,013 | |
| 37 | Kentucky | $361,362,897 | |
| 38 | Minnesota | $321,851,777 | |
| 39 | Louisiana | $309,525,843 | |
| 40 | New Hampshire | $267,886,459 | |
| 41 | Iowa | $257,051,973 | |
| 42 | Oregon | $193,706,513 | |
| 43 | Vermont | $185,015,910 | |
| 44 | South Dakota | $154,832,207 | |
| 45 | Montana | $151,160,011 | |
| 46 | Arkansas | $126,869,947 | |
| 47 | Guam | $125,308,260 | |
| 48 | Wisconsin | $106,660,436 | |
| 49 | North Dakota | $104,353,525 | |
| 50 | Delaware | $98,007,973 | |
| 51 | Maine | $78,596,803 | |
| 52 | Puerto Rico | $73,306,522 | |
| 53 | Wyoming | $51,838,712 | |
| 54 | American Samoa | $20,992,738 | |
| 55 | Northern Mariana Islands | $9,949,556 | |
| 56 | U.S. Virgin Islands | $3,954,899 |
Show all 56
Shares are of everything obligated under NAICS 541 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 333,674 listed here. See the rest on GovTribe.
Codes under 541
Quick answers
What is NAICS 541?
NAICS 541 is Professional, Scientific, and Technical Services, a subsector in NAICS 54, Professional, Scientific, and Technical Services.
What codes are under NAICS 541?
NAICS 541 has 9 codes under it with their own GovTribe pages, including 5411 Legal Services; 5412 Accounting, Tax Preparation, Bookkeeping, and Payroll Services; and 5413 Architectural, Engineering, and Related Services.
How much do federal agencies spend under NAICS 541?
Federal contracts under NAICS 541 obligated $221,627,380,724 in fiscal year 2025 and $896,731,861,305 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 541?
The contractors with the most obligated under NAICS 541 in fiscal years 2026 and 2027 are Electric Boat Corporation ($7,642,201,622); Booz Allen Hamilton Inc. ($6,027,852,870); and General Dynamics Information Technology, Inc. ($4,104,150,542).
Which agencies buy the most under NAICS 541?
The agencies that obligated the most under NAICS 541 in fiscal years 2026 and 2027 are Department of the Navy ($36,209,318,204), Air Force ($31,784,764,670) and Department of the Army ($23,883,561,831).
Which PSC codes are used with NAICS 541?
The PSC codes with the most obligated under NAICS 541 in fiscal years 2026 and 2027 are R425 Engineering and Technical Services, DA01 IT and Telecom – Business Application/
Where is the work under NAICS 541 performed?
By place of performance, the states with the most contract obligations under NAICS 541 over the last 12 months are Virginia ($53,980,473,800), Maryland ($22,632,807,259) and California ($17,276,819,257).
What is the latest contract opportunity under NAICS 541?
The latest contract opportunity under NAICS 541 is PACA Special Audits RFQ, solicitation from Air Education and Training Command (USAF), posted November 10, 2026.
On GovTribe
See everything under NAICS 541
- Federal contract opportunities, awards and IDVs under this code
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