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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 1101–1150 of 5719 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Clean Ports Air Quality Monitoring Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Soil Vapor Intrusion Assessment
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Revised Phase II Supplemental Assessment
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
FEMA FLOOD IMPACTS ENVIRONMENTAL & PERMITTING SERVICES
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Mainline Individual Slab Replacement and Ramp Slurry Seal \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Corporate: Construct Tieback Wall and Roadway Facilities \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Corporate: Furnish Polyester Concrete Overlay \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Environmental Oversight
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Environmental Consulting Services
54 - Professional, Scientific, and Technical Services
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Mar. 23, 2026
Environmental Resources: MRF Roof Repair
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 26, 2026
Corporate: Roadway Excavation, HMA (Type A), Minor Concrete and Lighting System \u2013 Stormwater Pollution Prevention 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 Storm Water Annual Report
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 - Environmental Compliance
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
Statewide Professional Environmental Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 13, 2026
Corporate: Crystal Springs Pipeline No. 2 Reach 5 Lining Replacement - Environmental Support
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 23, 2026
Corporate: Repair and Replace Drainage Systems \u2013 Water pollution control program
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Corporate: Repair and Replace Drainage Systems \u2013 Water quality monitoring report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 26, 2026
Lake and Sewer Replacement Environmental Impact Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Corporate: Wastewater Treatment Plant Upgrades - ENVIRONMENTAL \u2013 ASBESTOS\/LEAD
54 - Professional, Scientific, and Technical Services
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Apr. 02, 2026
Corporate: Furnish & place polyester concrete overlay and HMA-A \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
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Apr. 09, 2026
Corporate: Remove Guardrails and Place Concrete Barriers \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
Corporate: Roadway Signs, Pavement Delineation and Marking \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
Sunridge Program - Environmental Impact Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Corporate: Roadway Signs, Pavement Delineation and Marking \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 08, 2026
VERIFICATION SERVICES
54 - Professional, Scientific, and Technical Services
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Apr. 02, 2026
Lead Based Paint Inspection, Assessment
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 13, 2026
Sediment, Water Quality, and Biological Resources Professional Services
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Environmental Health and Safety Services
54 - Professional, Scientific, and Technical Services
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Apr. 08, 2026
Corporate: Polyester Concrete Overlay, Concrete Barrier, & Structural Concrete \u2013 Stormwater Pollution Prevention Plan Ls 1
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Hazardous Material Assessment Consulting Services
54 - Professional, Scientific, and Technical Services
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Apr. 15, 2026
Corporate: Chinatown Branch Library Renovation - Environmental
54 - Professional, Scientific, and Technical Services
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Apr. 08, 2026
Environmental Services
54 - Professional, Scientific, and Technical Services
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Apr. 16, 2026
Regional Water Quality Control Plant Air Emissions Testing
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Corporate: Const MVP & Access Rd, Trash Net, Conc Ditch Lining & MGS \u2013 Stormwater Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Const MVP & Access Rd, Trash Net, Conc Ditch Lining & MGS \u2013 Prepare Stormwater Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Const MVP & Access Rd, Trash Net, Conc Ditch Lining & MGS \u2013 Stormwater Annual Report
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Const MVP & Access Rd, Trash Net, Conc Ditch Lining & MGS \u2013 Stormwater Pollution Prevention Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 24, 2026
Corporate: Cold plane AC pavement and rubberized HMA-O \u2013 Water Pollution Control Program
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Greenhouse Gas Reduction Scenario Modeling
54 - Professional, Scientific, and Technical Services
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Apr. 20, 2026
PEIR for Connect SoCal 2050
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 20, 2026
Consulting Services for Parks Projects: Archaeological\/Cultural Resource Assessment
54 - Professional, Scientific, and Technical Services
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Mar. 23, 2026
Historic Resources Survey
54 - Professional, Scientific, and Technical Services
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Apr. 06, 2026
Language Interpretation Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 15, 2026
Translation\/Interpretation Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 01, 2026
Translation, Interpretation, and Language Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 01, 2026
In-Person American Sign Language Interpreting Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Verbal Interpreting and Written Translation Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 16, 2026
Corporate: JPCP, HMA, Aggregate Base, Earthwork and Bridge \u2013 Water Quality Sampling And Analysis
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Dec. 08, 2026
Negative Pressure Rooms Testing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Feb. 26, 2029
Analysis of Biodiesel and Renewable Diesel Feedstocks
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026

Showing 1101–1150 of 5719 bids that are currently: Active.