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The Professional, Scientific, and Technical Services sector comprises establishments that specialize in performing professional, scientific, and technical activities for others. These activities require a high degree of expertise and training. The establishments in this sector specialize according to expertise and provide these services to clients in a variety of industries and, in some cases, to households. Activities performed include: legal advice and representation; accounting, bookkeeping, and payroll services; architectural, engineering, and specialized design services; computer services; consulting services; research services; advertising services; photographic services; translation and interpretation services; veterinary services; and other professional, scientific, and technical services. This sector excludes establishments primarily engaged in providing a range of day-to-day office administrative services, such as financial planning, billing and recordkeeping, personnel, and physical distribution and logistics. These establishments are classified in Sector 56, Administrative and Support and Waste Management and Remediation Services.

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Showing 451–500 of 6119 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: Wastewater Ponds Rehabilitation Project - wpcp
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Surveying, Engineering, & Project Mngt. Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Energy Efficiency Technical Support
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 12, 2026
Professional Engineering Project Management CM CI Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 22, 2025
Corporate: LBRID Phase 2 Wastewater Ponds Rehabilitation Project - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: LBRID Phase 2 Wastewater Ponds Rehabilitation Project - QSD\/QSP Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Buoy Services Wave Data Renewal
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 16, 2025
Fall Protection Certification Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 15, 2025
Construction Management Services Sources Sought Notice
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 12, 2025
ENVIRONMENTAL AND ENGINEERING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 23, 2026
Creek Channel Rehabilitation Project
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 15, 2026
CONSTRUCTION MANAGEMENT SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 09, 2026
Corporate: Retaining Walls, Minor Concrete, Earthwork, And Modify Electrical \u2013 Pre\/Post Construction Surveys
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 06, 2026
Stormwater Engineering and Regulatory Compliance Support Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 22, 2025
ODOR MONITORING AND MODEL MAINTENANCE AND REFINEMENT
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 13, 2026
COLLECTION SYSTEM, and WRP MODEL DEVELOPMENT, MAINTENANCE and REFINEMENT
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 13, 2026
Corporate: Construction on State Highway in Santa Clara County Near Gilroy - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 11, 2025
Corporate: Retaining Walls, Minor Concrete, Earthwork, And Modify Electrical \u2013 Noise monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 06, 2026
Corporate: Construction on State Highway in Monterey County Near King City From Jolon Road Undercrossing - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 11, 2025
Corporate: Place HMA and Replace Culverts and Fencing \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Dec. 17, 2025
Corporate: Place HMA and Replace Culverts and Fencing \u2013 Time-Related Overhead
54 - Professional, Scientific, and Technical Services
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Dec. 17, 2025
Headworks Influent Channel Rehabilitation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 27, 2026
Engineering & Street Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 20, 2026
LFT Channel Dredging Design
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 13, 2026
City Park Revitalization Project
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 12, 2026
Bridge Replacement - Surveying Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 16, 2025
Fall Protection Certification Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 15, 2025
Taiwan ? Installation, Training, and Engineering Services (ITES)
54 - Professional, Scientific, and Technical Services
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Dec. 17, 2025
Facility Planning Services A-E IDIQ Sources Sought Notice
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: 01-0J8014 Wall Construction, Earthwork, and Drainage \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Jan. 08, 2026
City-County Airport for Professional On-Call Airport Planning Services
54 - Professional, Scientific, and Technical Services
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Dec. 18, 2025
On-Call Standard and Expedited Building and Fire Plan Review and Inspection Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 06, 2026
Development of Energy Resilience Plan
54 - Professional, Scientific, and Technical Services
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Jan. 09, 2026
Corporate: Construction of Pipeline - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Western Trunk Line Phase 2A - Land surveying\/site photography
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Western Trunk Line Phase 2A - quality control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
CIVIL ENGINEERING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 09, 2026
Truckee River Operating Agreement Hydrologic Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 24, 2025
Best Management Practices (BMP) Effectiveness
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 06, 2026
EPA Environmental Services Assistance Team (ESAT)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 22, 2025
RFQ No. N66001-26-Q-6020 Water Testing Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 12, 2025
Oceanside Harbor Marine Safety Unit - Modular Building
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 23, 2026
Professional Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Cold Plane, RHMA-G, Polyester Concrete Overlay, CB, Replace POC, & CMS System \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 22, 2026
Corporate: Replace Tuolumne Meadows Wastewater Treatment Plant - Quality Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 19, 2025
Corporate: Cold Plane, RHMA-G, Polyester Concrete Overlay, CB, Replace POC, & CMS System \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jan. 22, 2026
Corporate: Western Trunk Line Phase 2A - DEVELOP WATER SUPPLY
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Western Trunk Line Phase 2A - DRAIN INSPECTION & CLEANING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Western Trunk Line Phase 2A - MATERIALS TESTING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025
Corporate: Western Trunk Line Phase 2A - INSPECTION SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 18, 2025

Showing 451–500 of 6119 bids that are currently: Active.