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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 5934 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: Roadway Excavation, HMA (Type A), Minor Concrete and Lighting System \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Corporate: Roadway Excavation, HMA (Type A), Minor Concrete and Lighting System \u2013 Level 2 Critical Path Method Schedule
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Independent Cost Estimator
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
A&E Hazardous Waste Site Investigation
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Corporate: East Pipeline Inspection & Rehabilitation - Electrical Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: East Pipeline Inspection & Rehabilitation - Electrical Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
14th & O Improvements Project
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Drainage Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
Professional Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Housing Development - Phase 1
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Corporate: East Pipeline Inspection & Rehabilitation - Hydrostatic Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
General Engineering Contractor
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Roadway Infrastructure Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 02, 2026
Engineering Feasibility and Preliminary Design
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Design & Build Pioneer Oil Refinery
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Assessment Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Engineering Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Consultant Support Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Corporate: Roadway Excavation, HMA (Type A), Minor Concrete and Lighting System \u2013 Dust Control Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Air Monitoring: Air Testing and NOA, Mitigations Measure
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Bulkhead Gate Guide Installation & Commissioning
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Civil & Underground
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Design Features
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Noise & Vibration Monitoring
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - QA\/QC Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Anderson Dam Seismic Retrofit Project - Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Corporate: Richmond-San Rafael Bridge - INSPECTION ACCESS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Richmond-San Rafael Bridge - LEAD COMPLIANCE PLAN
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Richmond-San Rafael Bridge - 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: Richmond-San Rafael Bridge - TIME-RELATED OVERHEAD
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Richmond-San Rafael Bridge - DISPUTE RESOLUTION BOARD ON-SITE MEETING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Richmond-San Rafael Bridge - HOURLY OFF-SITE DISPUTE-RESOLUTION-BOARD-RELATED TASKS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
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
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
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
Green Acres Project (GAP) Reservoir
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 06, 2026
Siphon Assessments
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 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
Old Train Depot Revitalization
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 24, 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

Showing 301–350 of 5934 bids that are currently: Active.