Professional, Scientific, and Technical Services

NAICS 54120,670 contracts

Total awarded

$4,670,669,797

20,670

Total Contracts

$4,670,669,797

Total Awarded

$2,684,293

Avg Award

945

Open Now

Analytics

Contracts in Professional, Scientific, and Technical Services

20,670 contracts

PlanningSAM

SOLICITATION NUMBER 393274 “HANFORD TANK FARMS VADOSE GEOPHYSICAL LOGGING”

Department of Energy

Richland, WAPublished Today

Closes Dec 8, 2026

OpenSAM

PACA Special Audits RFQ

Department of the Air Force

ServicesJBSA Lackland, TXPublished Yesterday

Closes Dec 23, 2026

OpenSAM

Keyport Infrastructure Security Support Services Solicitation

Department of the Navy

ServicesKEYPORT, WAPublished Yesterday

Closes Dec 11, 2026

20,667 more contracts in this category

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More NAICS 541 notices

SYSTEM DELTA 84 (SYD 84/MT) MEDIUM EARTH ORBIT MISSILE WARNING / MISSILE TRACKING EPOCH 3 and EPOCH 4, REQUEST FOR INFORMATION (RFI)Sources Sought
NIMHD Division of Intramural Research Population Health and Clinical Research — Small Business Sources SoughtSources Sought
H961--Tri-Annual Electrical InspectionCombined Synopsis/Solicitation
Sole Source Solicitation Modoc National Forest Veterinary ServicesPresolicitation
Request for Information: Multi-Source PNT UEPresolicitation
PKA - USAF BAND ADVERTISING SUPPORT BPASources Sought
A--Notice of Intent - Research and Technology Advancement Support, A whitePSpecial Notice

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About this code

Professional, Scientific, and Technical Services is NAICS 541 in the North American Industry Classification System (NAICS), which federal agencies use to classify every contract opportunity by industry. We list 20,670 notices under this code, 945 of them open now. Notices come from SAM.gov and are refreshed daily. Federal contracts only: state and local bids are not included.

Frequently asked questions

What is NAICS code 541?

NAICS 541 is Professional, Scientific, and Technical Services in the North American Industry Classification System. Federal contracting officers assign one NAICS code to each opportunity to say which industry the work belongs to, and the code sets the small-business size standard for the contract.

How many federal contract opportunities are in Professional, Scientific, and Technical Services?

We track 20,670 federal notices in Professional, Scientific, and Technical Services (NAICS 541) from SAM.gov, of which 945 are open right now.

What is the total award value in Professional, Scientific, and Technical Services?

Award notices in NAICS 541 total $4,670,669,797, an average of $2,684,293 per award. Only contracts, orders and purchase orders count: IDIQ, schedule and agreement awards state a ceiling, not money spent, so they are left out.

How do I find Professional, Scientific, and Technical Services contracts?

Browse the open notices below, all published on SAM.gov, the US government's official contracting site. Federal notices only: state and local bids are not included.

Narrower codes in Professional, Scientific, and Technical Services

54151Computer Systems Design and Related Services6,489 5413Architectural, Engineering, and Related Services5,415 5416Management, Scientific, and Technical Consulting Services3,682 5417Scientific Research and Development Services2,491 5419Other Professional, Scientific, and Technical Services1,715 5418Advertising, Public Relations, and Related Services350 5411Legal Services194 54121Accounting, Tax Preparation, Bookkeeping, and Payroll Services167 5414Specialized Design Services144