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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 501–550 of 5682 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Lead Compliance Plan Ls 1
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Level 2 Critical Path Method Schedule Ls 1
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Time-Related Overhead (Wday) Wday 500
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Pre-Storm Event Inspection Report Ea 63
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Stormwater Annual Report Ea 3
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 SWPPP
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Design Build of the Trommel Screen No. 2 Replacement
54 - Professional, Scientific, and Technical Services
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Oct. 07, 2026
Material Testing and Inspections Projects
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Notice of Intent to Sole Source: Mission Termination System (MTS) to Autonomy Government Reference Architecture (A-GRA) Software Upgrade
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 WPCP
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 Asbestos Compliance Plan
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 Noise Monitoring
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 Vibration Monitoring
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Corporate: Construct Bridges, RW, SW, Pavement, Drainage and Electrical Systems \u2013 Building Survey & Monitoring
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Corporate: Big Trees Parkway Bridge Deck Replacement - Surveying
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Corporate: Pier B on Dock Rail Support Facility West Expansion & Pier B Street Realignment Project - CHEMICAL ANALYSIS SYSTEMS
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 LCP, CAS
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 WPCP
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Corporate: Inland Feeder\/San Bernardino Valley Municipal Water District Foothill Pump Station Intertie, Stage 1 - Survey
54 - Professional, Scientific, and Technical Services
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Sep. 29, 2026
Hydrogeological and Geotechnical Engineering Services
54 - Professional, Scientific, and Technical Services
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Sep. 29, 2026
Water and Wastewater Utility Planning and Engineering Services
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Plan Scanning Services
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Corporate: Cold plane AC Pavement and HMA (Type A) - Lead Compliance
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Corporate: Cold plane AC Pavement and HMA (Type A) - SWPPP Planning
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Corporate: Natomas Reach B Pumping Plant 5 - SWPPP Plan
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Corporate: Natomas Reach B Pumping Plant 5 - Vibration Monitoring
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Corporate: Natomas Reach B Pumping Plant 5 - Survey
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Corporate: Natomas Reach B Pumping Plant 5 - Quality Control & Pre\/Post Survey
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Construction Management and Inspection Services
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 30, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 Time-Related Overhead (Wday)
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Materials Testing and Deputy Inspection
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Intent to Sole Source VASNHS Pharmacy Hood Testing and Certification
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Office Space Planning
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Type A & B Master Plan, Joint Forces Training Base
54 - Professional, Scientific, and Technical Services
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Sep. 16, 2026
LUSD Design Professional Services
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Professional Design Services
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
On-Call Contracts for Engineering and Design Services
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Plan Review Inspection Services
54 - Professional, Scientific, and Technical Services
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Oct. 05, 2026
As-Needed Traffic Engineering Services
54 - Professional, Scientific, and Technical Services
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Sep. 29, 2026
Street Lighting Master Plan
54 - Professional, Scientific, and Technical Services
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Sep. 29, 2026
Specific Plan
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Construct Retaining Wall, MGS, Cold Plane & Pavement Widening \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Engineering Development Review & Inspection Services
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
ARCHITECTURAL SERVICES
54 - Professional, Scientific, and Technical Services
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Oct. 01, 2026
Corporate: 2026 & 2027 Accessibility and Drainage - WPCP
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Corporate: HD-S3171 HARBOR SCENIC DRIVE ROADWAY & INFRASTRUCTURE IMPROVEMENTS - QA\/QC
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Corporate: HD-S3171 HARBOR SCENIC DRIVE ROADWAY & INFRASTRUCTURE IMPROVEMENTS - Survey
54 - Professional, Scientific, and Technical Services
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Sep. 15, 2026
Design-Assist Construction of Pleasant Grove Wastewater Treatment Plant Electrical Power System
54 - Professional, Scientific, and Technical Services
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Oct. 21, 2026

Showing 501–550 of 5682 bids that are currently: Active.