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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 401–450 of 5341 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Pre-Design Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 27, 2026
Self-Performing Construction Work Feasibility Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 29, 2026
Prima Deshecha Landfill Renewable Energy Preliminary Design
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 01, 2026
Drilling CA NP YOSE MULTI(1) Yosemite NP Disaster Supplemental
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 11, 2026
Coastal Science and Engineering Support Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 23, 2026
Zone One Optimization Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 26, 2026
Corporate: Construct bridges, RW, JPCP, HMA Pavement, Drainage, and Electrical Systems \u2013 Noise Monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
Corporate: Construct bridges, RW, JPCP, HMA Pavement, Drainage, and Electrical Systems \u2013 Prestressing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
Corporate: Construct bridges, RW, JPCP, HMA Pavement, Drainage, and Electrical Systems \u2013 QC Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
Corporate: C0724 - Coyote Creek Flood Protection Project Phase 2 - CPM Scheduling
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: C0724 - Coyote Creek Flood Protection Project Phase 2 - Noise Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: C0724 - Coyote Creek Flood Protection Project Phase 2 - Quality Control and Material Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: C0724 - Coyote Creek Flood Protection Project Phase 2 - SWPPP Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: C0724 - Coyote Creek Flood Protection Project Phase 2 - Vibration Monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Blue Oak Charter School New Campus - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 12, 2026
Corporate: Blue Oak Charter School New Campus - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 12, 2026
Corporate: Eaton Wash Dam and Reservoir Post Fire Cleanout - Vibration\/Noise Mitigation\/Monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 09, 2026
Corporate: Pavement Rehabilitation Project (Fiberized Slurry Seal) - Traffic Control Plans
54 - Professional, Scientific, and Technical Services
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Jun. 16, 2026
Corporate: Pavement Rehabilitation Project (Fiberized Slurry Seal) - Prepare Storm Water Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 16, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Time-Related Overhead (Ls)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: HMA (Type A) and Modify Signal and Lighting Systems \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 16, 2026
Corporate: LOWER ALEMANY AREA STORMWATER IMPROVEMENTS - Quality Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Corporate: LOWER ALEMANY AREA STORMWATER IMPROVEMENTS - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Environmental Services (Personal Services)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 15, 2026
ALQ-249 Next Generation Jammer (NGJ) and Advanced Electronic Warfare (EW)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 16, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Pre-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 During-And Post-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Stormwater Annual Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Asbestos Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
ARCHITECTURAL\/ENGINEERING\/PLANNING\/ENVIRONMENTAL SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 26, 2026
Corporate: Flood Control Zone 1 Marsh Creek Storm Damage Repair Project - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 09, 2026
Corporate: Deer Valley Road Traffic Safety Improvements Project - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 23, 2026
Corporate: Chrisman Road Resurfacing - ANALYTICAL TESTING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 18, 2026
Corporate: Chrisman Road Resurfacing - GEOTECH ENGINEERS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 18, 2026
Corporate: Chrisman Road Resurfacing - SURVEYING
54 - Professional, Scientific, and Technical Services
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Jun. 18, 2026
Corporate: Chrisman Road Resurfacing - SWPP PLAN ONLY
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 18, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Blue Oaks Charter School New Campus - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 12, 2026
Corporate: Blue Oaks Charter School New Campus - Staking
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 12, 2026
Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 01, 2026
FUSION SUPPORT - system analysis, software and system engineering and analysis, development, application and customization, and technical writing services.
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 10, 2026
Services to Support Capital Improvement Projects
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
Engineering Design - Huasna Roundabout
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
City Hall Improvements \u2013 Building 4 Front Counter Remodel
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 02, 2026
Loma Improvements Project Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 13, 2026
CIVIC CENTER AND OLD TOWN PARKING GARAGE ARCHITECTURAL
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Stormwater Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 Pre-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Corporate: Bridge Replacement and Roadway Widening \u2013 During-And Post-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026

Showing 401–450 of 5341 bids that are currently: Active.