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    1. Home
    2. /Gov Explore
    3. /NAICS Codes
    4. /541990

    NAICS Demand Lane

    All Other Professional, Scientific, and Technical Services, Contract Opportunities

    4,756 total opportunities (4,756 active) tied to NAICS 541990 across federal, state, local, and forecast sources.
    NAICS 541990Federal + SLED4.8K total
    View NAICS definition →
    Total Opportunities
    4.8K
    Across all indexed sources
    Active Estimate
    4.8K
    Approximate active count
    Source Count
    3
    Federal, SLED, and forecast lanes

    Latest federal solicitations for NAICS 541990.

    DEPARTMENT OF THE TREASURY

    MAINTENANCE SERVICE FOR PORTABLE FIRE EXTINGUISHERS

    Active

    AI Summary

    The Department of the Treasury is seeking quotes for maintenance services for portable fire extinguishers at the Bureau of Engraving and Printing. This RFQ is set-aside for small businesses, with a deadline for quotes extended to 3:00 PM (ET) on October 22, 2026. An optional site visit is scheduled for October 15, 2026…

    DC

    Posted Oct 5, 2026Due Oct 22, 2026Combined Synopsis/SolicitationNAICS 541990Total Small Business Set-Aside (FAR 19.5)Sol: 2031ZA27Q00001
    View details→

    POSTAL SERVICE

    FY2027 USPS OIG BROAD AGENCY ANNOUNCEMENT

    Active

    AI Summary

    The USPS Office of Inspector General is soliciting proposals through a Broad Agency Announcement for professional, consultant, and support services. Proposals are accepted on a rolling basis until September 30, 2027. This BAA supersedes prior announcements, and no formal RFP will be issued. Compliance with specific reg…

    PA

    Posted Oct 5, 2026Due Oct 1, 2027SolicitationNAICS 541990Sol: 6HQOIG-27-A-0001
    View details→

    DEPT OF DEFENSE

    VANDENBERG SFB TANK INSPECTION

    Active

    AI Summary

    This opportunity involves a non-personnel services contract for inspections on Department of Defense fuel tanks at Vandenberg SFB. The work includes removal, disposal, transfer of remaining fuel, tank cleaning, replacing wiper seals, and conducting an aboveground storage tank inspection as detailed in Attachment B.

    NE

    Posted Sep 30, 2026Due Oct 30, 2026Combined Synopsis/SolicitationNAICS 541990Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside (FAR 19.14)Sol: W9128F27QA002
    View details→

    DEPARTMENT OF STATE

    WHA - DATA SYSTEMS SUPPORT SERVICES

    Archived

    AI Summary

    The Department of State is seeking data systems support services for the Bureau of Western Hemisphere Affairs. This requirement emphasizes a sole-source approach, necessitating personnel with specialized knowledge and capabilities to effectively identify, analyze, and execute established principles and methods.

    DC

    Posted Sep 30, 2026JustificationNAICS 541990Sol: 19AQMM26F1435
    View details→

    DEPARTMENT OF HEALTH AND HUMAN SERVICES

    NOTICE OF INTENT TO SOLE SOURCE – NATIONAL MARROW DONOR PROGRAM – SERVICE AGREEMENT

    Active

    AI Summary

    The Department of Health and Human Services intends to award a sole source service agreement with the National Marrow Donor Program for donor search and coordination services related to stem cell transplantation. The total value is not to exceed $900,000, and the acquisition follows FAR Part 13 Simplified Acquisition P…

    MD

    Posted Sep 30, 2026Due Oct 12, 2026Combined Synopsis/SolicitationNAICS 541990Sol: NOI-OD-27-000007
    View details→

    DEPT OF DEFENSE

    SOLE SOURCE: DEFENSE SECURITY COOPERATION AGENCY (DSCA) ASSESSMENT, MONITORING, AND EVALUATION (AM&E) DATABASE MANAGEMENT SUPPORT SERVICES

    Archived

    AI Summary

    The Defense Security Cooperation Agency (DSCA) is seeking sole source support for Assessment, Monitoring, and Evaluation (AM&E) Database Management Services. This opportunity is specifically for service provision and is classified under NAICS code 541990. Interested parties should prepare to respond to the RFP.

    VA

    Posted Sep 30, 2026JustificationNAICS 541990Sol: WHS-2026-1969-JA
    View details→

    DEPT OF DEFENSE

    711TH HPW MISSION SUPPORT SERVICES MAC IDIQ

    Active

    AI Summary

    The 711th Mission Support Services MAC IDIQ is a solicitation for proposals from qualified offerors. This 8(a) set-aside contract, with a maximum value of $505 million, will support the Air Force Research Laboratory over a five-year period. Proposals are due by October 15, 2026, and the government may award without neg…

    OH

    Posted Sep 29, 2026Due Oct 15, 2026Combined Synopsis/SolicitationNAICS 5419908(a) Set-Aside (FAR 19.8)Sol: FA239626RB008
    View details→

    DEPARTMENT OF VETERANS AFFAIRS

    Q201--HCR- MEDICAL PHYSICIST CONTRACT FOR RADIOLOGY AND DENTAL (VA-26-00023708) BASE CONTRACT YEAR 11/01/2026-10/31/2027 VA FINGER LAKES

    Active

    AI Summary

    The Department of Veterans Affairs is seeking a contractor to provide on-site diagnostic medical physics support services for the Finger Lakes Health VA Radiation Safety Program. The contract covers the period from November 1, 2026, to October 31, 2027, and requires a qualified team of medical physics professionals to …

    NY

    Posted Sep 29, 2026Due Oct 15, 2026SolicitationNAICS 541990Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside (FAR 19.14)Sol: 36C24226Q0905
    View details→

    POSTAL SERVICE

    FY2026 USPS OIG BROAD AGENCY ANNOUNCEMENT

    Archived

    AI Summary

    The USPS Office of Inspector General is soliciting proposals through a Broad Agency Announcement for professional, consultant, and support services. Proposals are accepted on a rolling basis until September 30, 2025. This announcement supersedes prior BAAs, and no formal RFP will be issued. Interested parties should re…

    PA

    Posted Sep 29, 2026Due Sep 30, 2026Sources SoughtNAICS 541990Sol: 6HQOIG-26-A-0002
    View details→

    FEDERAL COMMUNICATIONS COMMISSION

    USAC RFP: ORACLE OPERATIONS AND MAINTENANCE SERVICES

    Active

    AI Summary

    The Universal Service Administrative Company (USAC) is seeking proposals for Oracle Operations and Maintenance Services. This RFP outlines the required services and submission instructions, with proposals due by October 26, 2026, at 11:00 AM ET. Interested parties can find the RFP on USAC's website.

    DC

    Posted Sep 28, 2026Due Oct 26, 2026Combined Synopsis/SolicitationNAICS 541990Sol: IT-26-142
    View details→

    Source mix

    How this NAICS code is represented across indexed contract sources.

    federal
    4,362
    sled
    148
    forecast
    246

    Related NAICS Codes

    • 54, Professional, Scientific, and Technical Services→
    • 541, 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 →

    Explore

    • 541990 Definition→
    • Browse NAICS Codes→
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    • Browse by State→

    About NAICS 541990

    This industry comprises establishments primarily engaged in providing professional, scientific, and technical services not classified in other specific industries. These services include a variety of specialized consulting and advisory services.

    Read the full NAICS definition →