NAICS codes › 541990
NAICS 541990 — All Other Professional, Scientific, and Technical Services: federal contracts
28 open federal contract opportunities classified under NAICS 541990 (All Other Professional, Scientific, and Technical Services) on SAM.gov, refreshed nightly.
Open solicitations
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- Industrial Control Technician
- Q519--Research Support Psychological Assessment for PTSD Clinical Trial
- Helicopter Services for Idaho
- Generation and Delivery of Meteorological and Hydrological Forecasts for the Western Washington and Northwest Montana River Basins
- Dose Reconstruction and Related Activities to Support NIOSH's Responsibilities under the Energy Employees Occupational Illness Compensation Act (EEOICPA)
- Vandenberg SFB Tank Inspection
- 711th HPW Mission Support Services MAC IDIQ
- Maintenance Service for Portable Fire Extinguishers - BPA
- Data & AI Mission Expert Services (DAMES) IDIQ
- Water Resources Analytical and Professional Support Services - Multiple Award Task Order Contract (MATOC)
- U.S. Embassy Mexico International Narcotics & Law Enforcement Affairs (INL Mexico) CONOCER Criminal Analyst Certification Services
- TRAINING INSTRUCTOR OPERATOR SERVICES SUPPORT II
- Cleaning, Inspection, and Hazardous Waste Removal for Two 10,000-Gallon Oil/Water Separators
- Request for Information: Outreach and Industry Partnerships (OIP) Portal
- U.S. Army Geospatial Center (AGC) Three-Dimensional High Speed-High Altitude Mapping Operations and Technology Integration (3DH2-M OTI) Single Award Task Order…
- Fort Campbell, KY - API 653 External Tank Inspection
- Quality Assurance Services - Civil Works, Interagency and International Services (IIS), and Military Construction Projects in Puerto Rico and U.S. Virgin…
- Marine Resource Technical Services Throughout the Naval Facilities Engineering Systems Command (NAVFAC) Pacific Area of Responsibility
- ACC-APG Industry Update November 2026: Registration and request for topics
- One Acquisition Solution for Integrated Services Plus (OASIS+) 8(a) Small Business Set-Aside Continuously Open Solicitation
- One Acquisition Solution for Integrated Services Plus (OASIS+) Historically Underutilized Business Zone (HUBZone) Small Business Set-Aside Continuously Open…
- One Acquisition Solution for Integrated Services Plus (OASIS+) Unrestricted Continuously Open Solicitation
- One Acquisition Solution for Integrated Services Plus (OASIS+) Women-Owned Small Business (WOSB) Set-Aside Continuously Open Solicitation
- One Acquisition Solution for Integrated Services Plus (OASIS+) Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside Continuously Open Solicitation
- One Acquisition Solution for Integrated Services Plus (OASIS+) Total Small Business Set-Aside Continuously Open
- NASA Deep Space Autonomous Robotics Challenge: Call for Host Facility Interest
- FY2027 USPS OIG Broad Agency Announcement
- Golden Dome for America Commercial Solutions Opening
Who buys NAICS 541990
| Agency | Obligations, 24 mo | Actions |
|---|---|---|
| Department of Defense (DoD) | $5.1B | 1,579 |
| Department of Health and Human Services (HHS) | $942.7M | 816 |
| General Services Administration (GSA) | $289.9M | 832 |
| Department of Commerce (DOC) | $245.9M | 206 |
| Department of Transportation (DOT) | $226.9M | 126 |
| Department of Energy (DOE) | $176.4M | 46 |
| National Aeronautics and Space Administration (NASA) | $166.6M | 242 |
| Department of Homeland Security (DHS) | $156.9M | 125 |
| Department of State | $151.8M | 93 |
| Department of Veterans Affairs (VA) | $136.4M | 247 |
Who wins NAICS 541990 work
| Contractor | Obligations, 24 mo | Awards |
|---|---|---|
| SIERRA NEVADA COMPANY, LLC | $1.1B | 29 |
| THE MITRE CORPORATION | $622.8M | 1 |
| LOCKHEED MARTIN CORPORATION | $345.0M | 6 |
| INSTITUTE FOR DEFENSE ANALYSES | $335.4M | 12 |
| BOOZ ALLEN HAMILTON INC | $313.3M | 29 |
| HII MISSION TECHNOLOGIES CORP | $129.0M | 2 |
| THE CNA CORPORATION | $122.3M | 186 |
| THE RAND CORPORATION | $115.8M | 5 |
| THE MITRE CORPORATION | $99.4M | 35 |
| SYSTEMS PLANNING AND ANALYSIS, INC. | $96.7M | 6 |
NAICS 541990 contracts expiring in the next 18 months
2,321 contracts worth $21.8B. The largest:
| Incumbent | Buyer | What | Value | Ends | Est. solicitation | Record |
|---|---|---|---|---|---|---|
| OAK RIDGE ASSOCIATED UNIVERSITIES, INCORPORATED | Department of Energy | 541990 All Other Professional, Scientific, and Technical Services | $3.2B | 30 September 2027 | ~Q2 2027 | Details |
| HII MISSION TECHNOLOGIES CORP | GSA FAS | 541990 All Other Professional, Scientific, and Technical Services | $802.5M | 15 September 2027 | ~Q1 2027 | Details |
| BOOZ ALLEN HAMILTON INC | GSA FAS | 541990 All Other Professional, Scientific, and Technical Services | $774.2M | 09 September 2027 | ~Q1 2027 | Details |
| HII MISSION TECHNOLOGIES CORP | GSA FAS | 541990 All Other Professional, Scientific, and Technical Services | $604.9M | 28 February 2027 | Now / imminent | Details |
| BLUESTAQ LLC | GSA FAS | 541990 All Other Professional, Scientific, and Technical Services | $580.4M | 31 July 2027 | ~Q1 2027 | Details |
| NORTHROP GRUMMAN SYSTEMS CORPORATION | Navy | 541990 All Other Professional, Scientific, and Technical Services | $478.4M | 16 May 2027 | ~Q4 2026 | Details |
| NORIDIAN HEALTHCARE SOLUTIONS, LLC | CMS | 541990 All Other Professional, Scientific, and Technical Services | $407.4M | 09 May 2027 | ~Q4 2026 | Details |
| THE JOHNS HOPKINS UNIVERSITY APPLIED PHYSICS LABORATORY LLC | Washington Headquarters Services | 541990 All Other Professional, Scientific, and Technical Services | $346.7M | 29 June 2027 | ~Q4 2026 | Details |
| COVENTBRIDGE (USA) LLC | CMS | 541990 All Other Professional, Scientific, and Technical Services | $319.7M | 18 July 2027 | ~Q1 2027 | Details |
| SIERRA NEVADA COMPANY, LLC | Air Force | 541990 All Other Professional, Scientific, and Technical Services | $300.6M | 31 October 2026 | Now / imminent | Details |
Every expiring NAICS 541990 contract →
Contracts and task orders from USASpending.gov (FPDS) whose period of performance ends within 18 months, valued at $25K or more, excluding IDIQ ceilings and government-owned, contractor-operated facility contracts. Co-terminous orders from the same vendor, agency, NAICS and PSC ending in the same month are grouped. The solicitation date is an estimate (about six months before the contract ends): FedSift does not know whether a follow-on has been posted, so check SAM.gov.
Open solicitations by set-aside
| Set-aside | Open |
|---|---|
| Unrestricted (full and open) | 12 |
| Small business | 8 |
| 8(a) | 3 |
| SDVOSB | 3 |
| HUBZone | 1 |
| WOSB | 1 |
From the set-aside SAM.gov declares on each open notice.
Who counts as small under this code
SBA size standard for NAICS 541990: $15.5M annual receipts.
Each solicitation carries exactly one NAICS code, and that code — not a related one in the same family — decides who counts as small.
One code, chosen by the contracting officer, decides who counts as small. A related code in the same family does not qualify you, and the assignment itself can be appealed to SBA OHA.
Source: FAR 19.102, current as of 07 August 2026 · eCFR.
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Browse by NAICS code
336413 (522) · 336412 (240) · 541715 (214) · 236220 (181) · 332919 (165) · 332911 (155) · 237990 (144) · 334412 (116) · 541330 (115) · 332510 (115) · 334419 (111) · 334511 (111) · 339991 (109) · 332722 (91) · 336611 (90) · 335931 (80) · 334220 (79) · 333998 (72) · 333618 (68) · 333613 (67) · 335311 (65) · 335312 (62) · 531120 (60) · 332994 (56)