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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 301–350 of 5691 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Structural Engineering Services
54 - Professional, Scientific, and Technical Services
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Dec. 31, 2026
Corporate: TRUSD Universal TK Classroom at Various Sites LLB - Field engineering
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 15, 2026
Corporate: Municipal Water District Foothill Pump Station Intertie - Instrumentation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 29, 2026
Corporate: Cold plane, RHMA-G, SAMI, Drainage, Curb Ramps, And Electrical \u2013 Pre\/Post Construction Surveys
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 22, 2026
Total Dissolved Solids and Chloride Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 01, 2026
Plan Check, Back Check, and Inspection Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 14, 2026
ELM STREET COMMONS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 30, 2026
Corporate: JCSD Intervalley Pipeline Project - Weld Inspection Services
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: 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 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corona HUB Music Venue
54 - Professional, Scientific, and Technical Services
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Sep. 28, 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
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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
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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
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Sep. 15, 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
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Sep. 24, 2026
A&E On-Call Traffic Operation
54 - Professional, Scientific, and Technical Services
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Sep. 14, 2026
SEISMIC MODERNIZATION PROJECT
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Corporate: JCSD Intervalley Pipeline Project - Testing & Inspections
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - Settlement Monitoring
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - SWPPP
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Corporate: JCSD Intervalley Pipeline Project - Survey
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Citywide Energy Efficiency Upgrades
54 - Professional, Scientific, and Technical Services
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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
DEPUTY INSPECTION, MATERIALS TESTING AND REPORTING SERVICES
54 - Professional, Scientific, and Technical Services
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Oct. 02, 2026
Corporate: C155003 JCSD Intervalley Pipeline Project - CCTV Video Inspection
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Corporate: C155003 JCSD Intervalley Pipeline Project - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 18, 2026
Independent Cost Estimator (ICE) and Construction Scheduler
54 - Professional, Scientific, and Technical Services
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Sep. 16, 2026
Progressive Design-Build Services
54 - Professional, Scientific, and Technical Services
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Sep. 16, 2026
Architectural Services
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Development of the Manchester Avenue Site
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 02, 2026
Corporate: JCSD Intervalley Pipeline Project - SURVEYING
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 - Project Scheduler CPM
54 - Professional, Scientific, and Technical Services
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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: 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: Wastewater Systems Expansion Project - Testing\/Inspection
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 08, 2026
Corporate: Wastewater Systems Expansion Project - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 08, 2026
Corporate: Roadway Excavation and Hot Mix Asphalt (Type A) \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 06, 2026
Corporate: Roadway Excavation and Hot Mix Asphalt (Type A) \u2013 Level 2 Critical Path Method Schedule
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 06, 2026
Corporate: Roadway Excavation and Hot Mix Asphalt (Type A) \u2013 Time-Related Overhead (Wday)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 06, 2026
Corporate: Construct JPCP, HMA, Drainage System, sign structures, and Electrical System \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 06, 2026
Corporate: Construct JPCP, HMA, Drainage System, sign structures, and Electrical System \u2013 Time-Related Overhead (Wday)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 06, 2026

Showing 301–350 of 5691 bids that are currently: Active.