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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 5957 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Bridge, Road, and Trail Design, Engineering, Inspection, Maintenance
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 19, 2026
Facilities Condition Assessment, Environmental Inspections and Radon Remediation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 21, 2026
Corporate: Rdwy Exc, HMA, RHMA, Cl 2 AB, Conc. & Temp Barrier, and Mobilization \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 03, 2026
Long-term Traffic Control Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 21, 2026
Flood Mitigation and Restoration Planning Project
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 16, 2026
Corporate: Rdwy Exc, HMA, RHMA, Cl 2 AB, Conc. & Temp Barrier, and Mobilization \u2013 Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 03, 2026
Corporate: Cathedral City High School - Increment 02c - Architectural Woodwork
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 17, 2026
River Park Master Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 20, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement \u2013 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 \u2013 Progress Schedule (Critical Path Method)
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 \u2013 Time-Related Overhead
54 - Professional, Scientific, and Technical Services
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Aug. 26, 2026
Engineering Consulting Services for CCWRF RAS Header Replacement
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 19, 2026
Engineering Consulting Services for CCWRF HVAC System Upgrade
54 - Professional, Scientific, and Technical Services
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Aug. 19, 2026
Engineering Consulting Services for CCWRF Influent Box Rehabilitation
54 - Professional, Scientific, and Technical Services
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Aug. 25, 2026
Corporate: Milton Road over Hoods Creek Bridge Replacement \u2013 Swallow Exclusion Plan
54 - Professional, Scientific, and Technical Services
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Aug. 26, 2026
Corporate: City of Fullerton Well 10 PFAS Treatment Project - Survey
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Corporate: CITY OF FULLERTON WELL 10 PFAS TREATMENT - SWPPP
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Hydrogeologists
54 - Professional, Scientific, and Technical Services
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Aug. 19, 2026
Design Services
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Engineering, Design, Planning, and Permitting
54 - Professional, Scientific, and Technical Services
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Aug. 20, 2026
Full-Service Facilities Architectural and Engineering Services
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Corporate: AEWSD Frick Unit - Phase 3 Laterals \u2013 Survey
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Building Inspection Department Mobile Application
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Phase II of Engine Company 23 Junior Arts Center
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 29, 2026
Facility Planning Services A-E IDIQ Small Business Set-Aside
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Fire Training Tower Renovations
54 - Professional, Scientific, and Technical Services
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Aug. 20, 2026
POWER PLANT AND SOURCE RELATIVE ACCURACY TEST AUDIT (RATA) TESTING
54 - Professional, Scientific, and Technical Services
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Aug. 27, 2026
Provide Consulting Support Services
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Traffic Engineering, Traffic Analysis, And Parking Study Services
54 - Professional, Scientific, and Technical Services
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Aug. 21, 2026
Corporate: Frick Unit \u2013 Phase 3 Laterals - SURVEYING
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Corporate: Frick Unit \u2013 Phase 3 Laterals - SWPPP
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Corporate: Groundwater Recharge Capacity Expansion Project - Quality Control Testing
54 - Professional, Scientific, and Technical Services
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Aug. 17, 2026
Corporate: Groundwater Recharge Capacity Expansion Project - Survey
54 - Professional, Scientific, and Technical Services
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Aug. 17, 2026
USU Gateway
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Safety and Access Redefined
54 - Professional, Scientific, and Technical Services
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Aug. 20, 2026
Well No. 12 Treatment Pilot Study Engineering Services
54 - Professional, Scientific, and Technical Services
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Aug. 20, 2026
ALTERNATIVE DESIGN-BUILD SERVICES
54 - Professional, Scientific, and Technical Services
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Sep. 11, 2026
GRAND QUADRANT WATERLINE REPLACEMENT
54 - Professional, Scientific, and Technical Services
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Aug. 25, 2026
Progressive Design-Build Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 10, 2026
Bridge Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 19, 2026
Professional Design Services
54 - Professional, Scientific, and Technical Services
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Aug. 26, 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
Corporate: Construct Acceleration Lanes \u2013 SWPPP & Related Items
54 - Professional, Scientific, and Technical Services
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Aug. 25, 2026
Corporate: Construct Acceleration Lanes \u2013 Testing
54 - Professional, Scientific, and Technical Services
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Aug. 25, 2026
Corporate: Construct Concrete Barrier & MGS, Install Striping and Signing - LEAD COMPLIANCE PLAN LS LUMP SUM
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Corporate: Construct Concrete Barrier & MGS, Install Striping and Signing - TIME-RELATED OVERHEAD (WDAY) WDAY 90
54 - Professional, Scientific, and Technical Services
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Aug. 18, 2026
Engineering Services
54 - Professional, Scientific, and Technical Services
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Aug. 28, 2026
Corporate: Construct Acceleration Lanes \u2013 LEAD COMPLIANCE PLAN LS LUMP SUM
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Corporate: Construct Acceleration Lanes \u2013 TIME-RELATED OVERHEAD (LS) LS LUMP SUM
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026
Corporate: Construct Acceleration Lanes \u2013 DURING-AND POST-STORM EVENT INSPECTION REPORT
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 25, 2026

Showing 301–350 of 5957 bids that are currently: Active.