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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 601–650 of 6109 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: NATOMAS REACH B PP5 - Pre\/Post Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 31, 2026
Corporate: MacArthur Park Stormwater Capture - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Corporate: PIER B ON-DOCK RAIL SUPPORT FACILITY WEST EXPANSION AND PIER B STREET REALIGNMENT - SWPPP BMP Installation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 15, 2026
Corporate: PIER B ON-DOCK RAIL SUPPORT FACILITY WEST EXPANSION AND PIER B STREET REALIGNMENT - QA\/QC
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 15, 2026
Corporate: PIER B ON-DOCK RAIL SUPPORT FACILITY WEST EXPANSION AND PIER B STREET REALIGNMENT - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 15, 2026
Corporate: Storm Drain Pump Station 6 - Replacement and Infiltration Repairs - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 04, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement - Construction Staking
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 26, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 26, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement - SWPPP \u2013 Plans, Inspections, Reporting
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 26, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement - Plans & Reporting
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 26, 2026
Corporate: UNIVERSITY DRIVE PAVEMENT REHABILITATION - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 24, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement - Quality Control
54 - Professional, Scientific, and Technical Services
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Aug. 26, 2026
Corporate: UNIVERSITY DRIVE PAVEMENT REHABILITATION - Legends
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 24, 2026
Corporate: UNIVERSITY DRIVE PAVEMENT REHABILITATION - SURVEY
54 - Professional, Scientific, and Technical Services
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Aug. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Pre-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 During-And Post-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Stormwater Annual Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Pre-Storm Event Inspection Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Stormwater Annual Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026
Corporate: Runway 19L, 28L and 28R Timber Trestles Improvement - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 09, 2026
Corporate: Runway 19L, 28L and 28R Timber Trestles Improvement - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 09, 2026
Corporate: Runway 19L, 28L and 28R Timber Trestles Improvement - Temp Engineering and Marine Work
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 09, 2026
Corporate: Los Altos School District - San Antonio Campus - Architectural woodwork
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 10, 2026
Corporate: Los Altos School District - San Antonio Campus - MEPF
54 - Professional, Scientific, and Technical Services
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Sep. 10, 2026
Professional Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 09, 2026
Stormwater Sampling, Monitoring, Reporting and Support
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
Water Management Plan, Testing, and Remediation Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
A&E On-Call Traffic Operation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 14, 2026
DDJC, DDSP, and DDOO Thermal Heat Chambers Inspections
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Corporate: Install drainage systems and Pvmt delineation, construct driveway - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
Corporate: Install drainage systems and Pvmt delineation, construct driveway - WPCP & Inspections
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
MD-1 Hidden Lakes Surface Water Treatment Plant
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 04, 2026
SEISMIC MODERNIZATION PROJECT
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 30, 2026
Corporate: JCSD Intervalley Pipeline Project - Testing & Inspections
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - Settlement Monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Corporate: Construction on State Highway in Napa County in Napa at Sousa Lane and at 1.4 Miles North of Vichy Avenue - Water Pollution Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
Corporate: Construction on State Highway in Napa County in Napa at Sousa Lane and at 1.4 Miles North of Vichy Avenue - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 27, 2026
Corporate: Construction of Graeagle Johnesville Road Rehabilitation - ANALYTICAL TESTING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Corporate: Construction of Graeagle Johnesville Road Rehabilitation - GEOTECH ENGINEERS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Corporate: Construction of Graeagle Johnesville Road Rehabilitation - SURVEYING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Corporate: Construction of Graeagle Johnesville Road Rehabilitation - SWPP PLAN ONLY
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Arc Flash Study of All Off-Site Facilities
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 10, 2026
Multi Conjugate Adaptive Optics Technical Support
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 19, 2026
Mass Calibrator Training
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Corporate: Construct Acceleration Lanes \u2013 Lead compliance plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Citywide Energy Efficiency Upgrades
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Runway 8-26 Pavement Rehabilitation Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026

Showing 601–650 of 6109 bids that are currently: Active.