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    1. Home
    2. /Gov Explore
    3. /NAICS Codes
    4. /541

    NAICS Demand Lane

    Professional, Scientific, and Technical Services, Contract Opportunities

    92,813 total opportunities (92,813 active) tied to NAICS 541 across federal, state, local, and forecast sources.
    NAICS 541Federal + SLED92.8K total
    View NAICS definition →
    Total Opportunities
    92.8K
    Across all indexed sources
    Active Estimate
    92.8K
    Approximate active count
    Source Count
    3
    Federal, SLED, and forecast lanes

    Latest federal solicitations for NAICS 541.

    DEPT OF DEFENSE

    99 CES FIRE SUPPRESSION CERTIFICATION

    Active

    AI Summary

    The Department of Defense is seeking quotes for fire suppression certification services at Nellis AFB, Nevada. The project includes testing and certification of fire suppression systems for multiple buildings. This is a total small business set-aside under NAICS 541330. Proposals are due by 02 September 2026, and a Fir…

    NV

    Posted Aug 25, 2026Due Sep 15, 2026Combined Synopsis/SolicitationNAICS 541330Total Small Business Set-Aside (FAR 19.5)Sol: FA486126Q0025
    View details→

    DEPARTMENT OF TRANSPORTATION

    POST-CONSTRUCTION ENVIRONMENTAL COMPLIANCE MONITORING SERVICES FOR OR FLAP GRANT 24(2) GRANITE HILL ROAD RECONSTRUCTION PHASE II

    Active

    AI Summary

    This opportunity is a request for quotation (RFQ) for post-construction environmental compliance monitoring services related to the Granite Hill Road Reconstruction Phase II project. It is a total small business set-aside, and offers are being requested under simplified acquisition procedures. Interested bidders should…

    WA

    Posted Aug 25, 2026Due Sep 10, 2026Combined Synopsis/SolicitationNAICS 541990Total Small Business Set-Aside (FAR 19.5)Sol: 69056726Q000034
    View details→

    DEPARTMENT OF TRANSPORTATION

    POST-CONSTRUCTION ENVIRONMENTAL COMPLIANCE MONITORING SERVICES IN SUPPORT OF WA NP LARO 208(1), HAWK CREEK ROAD STABILIZATION AND WA FLAP LINCOL 57860(1) HAWK CREEK ROAD IMPROVEMENTS

    Active

    AI Summary

    This opportunity is a request for quotation (RFQ) for post-construction environmental compliance monitoring services related to road stabilization and improvements. It is a total small business set-aside, and offers are being requested as per the combined synopsis/solicitation format. Interested bidders should refer to…

    WA

    Posted Aug 25, 2026Due Sep 10, 2026Combined Synopsis/SolicitationNAICS 541990Total Small Business Set-Aside (FAR 19.5)Sol: 69056726Q000036
    View details→

    DEPT OF DEFENSE

    DORM WI-FI HEAT MAPPING SURVEY

    Active

    AI Summary

    The Department of Defense, specifically the Air Force, is seeking a contractor to provide Wi-Fi heat mapping services as outlined in the Performance Work Statement. Interested contractors must submit questions by September 1, 2026, and offers via email. A site visit is scheduled for August 31, 2026, at Tyndall AFB, FL.

    FL

    Posted Aug 25, 2026Due Aug 31, 2026Combined Synopsis/SolicitationNAICS 541512Total Small Business Set-Aside (FAR 19.5)Sol: FA481926Q0108
    View details→

    DEPARTMENT OF AGRICULTURE

    AMERICAN ELM SEED ORCHARDS, RESISTANCE TRIALS, AND SYNTHESIS

    Active

    AI Summary

    The USDA Forest Service seeks a contractor for scientific and technical support in the American elm breeding and restoration program. Responsibilities include leading manuscripts, monitoring resistance trials, and coordinating disease-resistant seed orchards. Expertise in plant pathology, genetics, and restoration ecol…

    GA

    Posted Aug 25, 2026Due Sep 16, 2026Combined Synopsis/SolicitationNAICS 541715Total Small Business Set-Aside (FAR 19.5)Sol: 12444726Q0074
    View details→

    DEPT OF DEFENSE

    MASS PROPERTIES MEASURING INSTRUMENTS CALIBRATION SERVICES

    Active

    AI Summary

    The U.S. Army Yuma Proving Ground is seeking market research responses for Mass Properties Measuring Instruments Calibration Services. Interested parties should provide capability statements detailing their experience and resources. This opportunity may lead to a competitive procurement, potentially set aside for small…

    AZ

    Posted Aug 25, 2026Due Sep 25, 2026Sources SoughtNAICS 541380Sol: PANMCC26P0000049755
    View details→

    DEPT OF DEFENSE

    MASS CALIBRATOR TRAINING

    Active

    AI Summary

    The Department of Defense is soliciting proposals for mass calibrator training services. This opportunity is a combined synopsis/solicitation under FAR Part 13, requiring all-or-none quotes. Interested parties must submit their proposals electronically by the specified deadline. Ensure registration in SAM as all respon…

    CA

    Posted Aug 25, 2026Due Sep 1, 2026Combined Synopsis/SolicitationNAICS 541380Sol: N6426726Q4252
    View details→

    DEPARTMENT OF HEALTH AND HUMAN SERVICES

    GIMC - AIR QUALITY TESTING

    Active

    AI Summary

    The Department of Health and Human Services is soliciting quotes for air quality testing services under Solicitation No. 75H71026Q00256. Interested bidders must submit their quotes via email to Mr. Stephen Silversmith by the specified deadline. Questions regarding the RFQ should also be directed to Mr. Silversmith by A…

    AZ

    Posted Aug 25, 2026Due Aug 28, 2026SolicitationNAICS 541620Indian Small Business Economic Enterprise (ISBEE) Set-Aside (specific to Department of Interior and Indian Health Services)Sol: 75H71026Q00256
    View details→

    DEPARTMENT OF STATE

    GUATEMALA - PUBLIC OPINION RESEARCH SERVICES

    Archived

    AI Summary

    The U.S. Embassy in Guatemala seeks a qualified opinion research firm to conduct audience analysis surveys and focus groups over one year. This initiative aims to gather reliable data on public perceptions to enhance strategic communications and support various mission-related activities.

    DC

    Posted Aug 25, 2026Due Aug 17, 2026SolicitationNAICS 541910Sol: 19GT5026Q0067
    View details→

    DEPT OF DEFENSE

    RAWS ATCALS FIBER OPTIC & RADIO SYSTEM REPLACEMENT

    Active

    AI Summary

    The Department of Defense is seeking proposals for Engineer-Furnish-Install-and-Test services to replace failing telecommunications infrastructure at Joint Base Lewis-McChord. This project involves integrating TC Communications JumboSwitch equipment to connect critical facilities, including the ATC Tower and Weather St…

    IL

    Posted Aug 25, 2026Due Aug 27, 2026SolicitationNAICS 541519Total Small Business Set-Aside (FAR 19.5)Sol: FA440726QRAWS
    View details→

    Source mix

    How this NAICS code is represented across indexed contract sources.

    federal
    53,882
    sled
    35,534
    forecast
    3,397

    Related NAICS Codes

    • 54, Professional, Scientific, and Technical Services→
    • 5411, Legal Services→
    • 54111, Offices of Lawyers→
    • 541110, Offices of Lawyers→
    • 54112, Offices of Notaries→
    • 541120, Offices of Notaries→
    • 54119, Other Legal Services→
    • 541191, Title Abstract and Settlement Offices →
    • 541199, All Other Legal Services →
    • 5412, Accounting, Tax Preparation, Bookkeeping, and Payroll Services→

    Explore

    • 541 Definition→
    • Browse NAICS Codes→
    • PSC Contract Lanes→
    • AI Contract Categories→
    • Browse by Agency→
    • Browse by State→

    About NAICS 541

    This sector comprises establishments that specialize in performing professional, scientific, and technical services for others. These services require a high degree of expertise and training.

    Read the full NAICS definition →