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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 551–600 of 5646 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: Richmond-San Rafael Bridge - WATER POLLUTION CONTROL PROGRAM
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Richmond-San Rafael Bridge - WORK AREA MONITORING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Clean & paint Str steel Br., Salvage Traveler, Fender and Pier Repair \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Clean & paint Str steel Br., Salvage Traveler, Fender and Pier Repair \u2013 Level 2 Critical Path Method Schedule
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Clean & paint Str steel Br., Salvage Traveler, Fender and Pier Repair \u2013 Time-Related Overhead (Ls)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Wildcat Fish Passage Implementation Project - Construction Survey (Pre and Post)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Wildcat Fish Passage Implementation Project - Water Pollution Control\/SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Light Rail Vehicle Component Inspection Systems
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Corporate: Chinatown Branch Library Renovation - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Corporate: Bullard Talent K-8 School Classrooms HVAC Replacement - Test and Balance, and supplies
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 17, 2026
BUILDING COMMISSIONING PROGRAM DEVELOPMENT SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Water System Master Plan Update
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 17, 2026
Corporate: Crystal Springs Pipeline No. 2 Reach 5 Lining Replacement - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 23, 2026
Corporate: Street Improvements - SURVEY\/SURVEY MONUMENTS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 19, 2026
Corporate: Eight Mile Road Resurfacing - SURVEYING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 19, 2026
Corporate: Eight Mile Road Resurfacing - SWPP PLAN ONLY
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 19, 2026
Consulting Services for Parks Projects: Geotechnical Engineering Services
54 - Professional, Scientific, and Technical Services
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Mar. 23, 2026
Municipal Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 30, 2026
Green Acres Project (GAP) Reservoir
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
Corporate: Construction on State Highway in Stanislaus County in and Near Patterson - Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Corporate: Ayala High School Performing Arts Center - SURVEYING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 19, 2026
Corporate: Repair and Replace Drainage Systems \u2013 Lead compliance plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 26, 2026
Corporate: Rodeo Creek Bank Erosion Repair - Staking\/Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Rodeo Creek Bank Erosion Repair - Quality Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Rodeo Creek Bank Erosion Repair - Prepare WPCP & Inspections
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: CONSTRUCTION ON STATE HIGHWAY IN YUBA COUNTY AT AND NEAR OLIVEHURST - SWPPP PREP\/WATER POLLUTION CONTROL PLAN PREPARE
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Construction on State Highway in Yuba County - ANALYTICAL TESTING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Construction on State Highway in Yuba County - GEOTECH ENGINEERS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Construction on State Highway in Yuba County - SWPP PLAN ONLY
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Salinas Valley Health Seismic Compliance - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Siphon Assessments
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: WILDCAT FISH PASSAGE IMPLEMENTATION PROJECT - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
QRE Shock and Vibration Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Radiogenic Isotope Analyses
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 20, 2026
Engineering Support Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 28, 2026
Provide Planning\/Environ, Engineering and Project Mgmt.
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
ENGINEERING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
Replace Lampton Cliffs Coastal Accessway Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
REVITALIZATION OF THE MARTINEZ OLD TRAIN DEPOT
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 24, 2026
Inspector of Record for Evans Center Modernization & Voluntary Seismic
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Special Inspections and Testing Services for the Evans Center Modernization
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Building Envelope Performance Testing Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
SPECIAL INSPECTOR SERVICES FOR MISSION SMART CLASSROOM PHASE 2
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
INSPECTOR OF RECORD FOR MISSION SMART CLASSROOM PHASE 2
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026
Engineering Services for HSIP Cycle 12 Pedestrian School Crossings
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Corporate: Diamond Valley Lake Holland Road Storm Drainage Improvements - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Corporate: Wildcat Fish Passage - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Wildcat Fish Passage Implementation Project - Pre\/Post Construction Surveys
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: ADA RAMP AND SIDEWALK IMPROVEMENTS - survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 23, 2026
Housing Development Bureau Fee Studies TOS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 31, 2026

Showing 551–600 of 5646 bids that are currently: Active.