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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 901–950 of 5496 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Corporate: Water Line Replacement at Oakland and Santa Fe - Traffic Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 21, 2026
Preparation of a Nexus Study Update
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 25, 2026
Independent Investigator Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 03, 2026
SYSTEM DELTA 84 (SYD 84\/MT) MEDIUM EARTH ORBIT MISSILE WARNING \/ MISSILE TRACKING EPOCH 3 and EPOCH 4, REQUEST FOR INFORMATION (RFI)
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 31, 2026
Art Consultant Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 22, 2026
Tech Assistance and Consulting Services
54 - Professional, Scientific, and Technical Services
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Oct. 06, 2026
Corporate: Earthwork, Construct Solider Pile Walls and Place New Roadway Sections - HOURLY OFF-SITE DISPUTE-RESOLUTION-BOARD-RELATED TASKS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 07, 2026
Corporate: Roadway Excavation, HMA, and Modifying Lighting Systems \u2013 Level 2 critical path method schedule
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 22, 2026
Corporate: Earthwork, Construct Solider Pile Walls and Place New Roadway Sections - CONTRACTOR-SUPPLIED BIOLOGIST
54 - Professional, Scientific, and Technical Services
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Oct. 07, 2026
Corporate: Earthwork, Construct Solider Pile Walls and Place New Roadway Sections - NATURAL RESOURCE PROTECTION PLAN
54 - Professional, Scientific, and Technical Services
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Oct. 07, 2026
Economic Impact Assessment Services
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Updating the City's ADA self-evaluation and Transition Plan
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Downtown Project Master Developer
54 - Professional, Scientific, and Technical Services
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Oct. 21, 2026
Corporate: Roadway Excavation, HMA, and Modifying Lighting Systems \u2013 Stormwater annual report
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Corporate: Roadway Excavation, HMA, and Modifying Lighting Systems \u2013 Data core
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Professional Consulting Services for CFAI Accreditation
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
California Hospitals Almanac
54 - Professional, Scientific, and Technical Services
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Sep. 17, 2026
Fossil Gas Related Technical Assistance
54 - Professional, Scientific, and Technical Services
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Sep. 25, 2026
Cross-Connection Control Program Implementation Services
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Enterprise Resource Planning
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Professional Consulting Services
54 - Professional, Scientific, and Technical Services
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Sep. 17, 2026
Fee Study and Nexus Study Consulting Services
54 - Professional, Scientific, and Technical Services
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Sep. 30, 2026
Council Chambers Technical Support Services
54 - Professional, Scientific, and Technical Services
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Sep. 29, 2026
Operation of a Homeless Services Facility
54 - Professional, Scientific, and Technical Services
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Oct. 08, 2026
Hearing Officer Services
54 - Professional, Scientific, and Technical Services
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Sep. 22, 2026
Tenant Based Rental Assistance (TBRA) Program
54 - Professional, Scientific, and Technical Services
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Sep. 21, 2026
General Plan and Zoning Code Update Provider
54 - Professional, Scientific, and Technical Services
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Oct. 09, 2026
Investment Advisory Services
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Consultant Services for the Water Forum
54 - Professional, Scientific, and Technical Services
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Sep. 21, 2026
CITYWIDE AQUATICS SERVICES
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Dispute Resolution Board On-Site Meeting
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Hourly Off-Site Dispute-Resolution-Board-Related Tasks
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 Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Fixed-Based Operators
54 - Professional, Scientific, and Technical Services
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Sep. 23, 2026
KRCD Boundary Adjustment
54 - Professional, Scientific, and Technical Services
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Sep. 18, 2026
Audit Services
54 - Professional, Scientific, and Technical Services
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Sep. 23, 2026
Waste Material Characterization Consulting Services
54 - Professional, Scientific, and Technical Services
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Sep. 25, 2026
Corporate: Replace Drainage, Electrical Systems, and Guardrail with Concrete Barrier \u2013 Level 2 critical path method schedule
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 Dispute resolution board on-site meeting
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 Hourly off-site dispute-resolution-board-related tasks
54 - Professional, Scientific, and Technical Services
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Sep. 24, 2026
Biological Consulting
54 - Professional, Scientific, and Technical Services
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Sep. 25, 2026
Customer Notice Processing Services
54 - Professional, Scientific, and Technical Services
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Oct. 01, 2026
UNACORN Tactical Edge: Decentralized Federated Learning and Real-Time Data Assurance
54 - Professional, Scientific, and Technical Services
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Sep. 28, 2026
Engagement Support for Native American Culture Beneficial Uses
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 23, 2026
Communications Consultants
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 08, 2026
Community Sustainability Engagement
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Oct. 08, 2026
Professional Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 25, 2026
Countywide User Fee Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 30, 2026
Investment Advisory and Management Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 22, 2026
Corporate: Behavioral Health Campus at Metropolitan State Hospital - Traffic Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Sep. 24, 2026

Showing 901–950 of 5496 bids that are currently: Active.