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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 401–450 of 5917 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
Esplanade Park Coastal Access Enhancement and Adaptation Plan
54 - Professional, Scientific, and Technical Services
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Mar. 23, 2026
Airport Services for Architectural\/Engineering
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Corporate: Old Castle Road Pipeline PH 2 Project - SWPPP\/WPCP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Old Castle Road Pipeline PH 2 Project - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Old Castle Road Pipeline PH 2 Project - Traffic Control Plans
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 25, 2026
Corporate: Cold Plane and RHMA-G with Various HMA Dig Outs \u2013 Provide WPCP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Corporate: Cold Plane and RHMA-G with Various HMA Dig Outs \u2013 Provide SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 18, 2026
Corporate: Cold Plane and RHMA-G with Various HMA Dig Outs \u2013 Provide Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 18, 2026
Corporate: Morgan Territory Road at Post Mile 5.0 Bridge Replacement Over Marsh Creek - Asbestos Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: Cold Plane, HMA(Type A), RHMA(OGFC) & High Friction Surface Treatment \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Corporate: Old Castle Road Phase 2 Project - SWPPP
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Corporate: Cold Plane, HMA(Type A), RHMA(OGFC) & High Friction Surface Treatment \u2013 Testing
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Corporate: SCSD District Wide Building Envelope - Field Engineering
54 - Professional, Scientific, and Technical Services
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Mar. 18, 2026
Corporate: Prepare Deck Surface, Place Polyester Concrete Overlay, and place HMA \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: Prepare Deck Surface, Place Polyester Concrete Overlay, and place HMA \u2013 Time-Related Overhead (Wday)
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: Secondary Treatment System Upgrades Project - Land Surveyor
54 - Professional, Scientific, and Technical Services
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Mar. 18, 2026
Collaborative Delivery Owner Advisor Services
54 - Professional, Scientific, and Technical Services
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Mar. 18, 2026
Professional Services for Storm Water & Wastewater Regulatory Compliance & Engineering Design
54 - Professional, Scientific, and Technical Services
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Mar. 31, 2026
Building Inspection and Plan Review Services
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Engineer for Municipal Utility
54 - Professional, Scientific, and Technical Services
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Apr. 02, 2026
Corporate: Replace Pavement Delineation and Roadside Signs \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Pavement Design Consulting Services
54 - Professional, Scientific, and Technical Services
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Mar. 24, 2026
Professional Services for Design and Construction Support for Renovations at 922 East California Avenue
54 - Professional, Scientific, and Technical Services
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Mar. 31, 2026
Construction Management
54 - Professional, Scientific, and Technical Services
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Apr. 07, 2026
Traffic and Transportation Engineering Services
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Districtwide Mechanical and Controls Upgrade Design-Build
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Safe Routes to Parks and Wheelchair Assessment Plan
54 - Professional, Scientific, and Technical Services
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Mar. 30, 2026
Corporate: Old Castle Road Phase 2 - Survey
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Corporate: Old Castle Road Phase 2 - Erosion Control
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Corporate: Prepare Deck Surface, Place Polyester Concrete Overlay, and Place HMA \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: ROUTE 33 -FOR CONSTRUCTION ON STATE HIGHWAY IN MERCED COUNTY - LEAD COMPLIANCE PLAN
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: ROUTE 33 -FOR CONSTRUCTION ON STATE HIGHWAY IN MERCED COUNTY - SWPPP PREP\/WATER POLLUTION CONTROL PLAN PREPARE
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: Cold plane, place HMA (Type A), RHMA (Type O), and RHMA (Type G) \u2013 Lead Compliance
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: Cold plane, place HMA (Type A), RHMA (Type O), and RHMA (Type G) \u2013 SWPPP Planning
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: West High School Sports Field Renovations - surveying
54 - Professional, Scientific, and Technical Services
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Mar. 24, 2026
Corporate: Buena Park Middle School Track Replacement - surveying
54 - Professional, Scientific, and Technical Services
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Mar. 19, 2026
ARCHITECTURAL, MECHANICAL, ELECTRICAL, PLUMBING
54 - Professional, Scientific, and Technical Services
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Apr. 02, 2026
Project 5007 Highlands Ranch Tank Improvement
54 - Professional, Scientific, and Technical Services
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Mar. 20, 2026
Architecture Services
54 - Professional, Scientific, and Technical Services
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Mar. 25, 2026
Progressive Design-Build Services
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Corporate: Pipeline 5 Relining Oceanside 5 Flow Control Facility to Huckleberry Lane - Survey
54 - Professional, Scientific, and Technical Services
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Mar. 17, 2026
Corporate: South Park Drive Road Rehab - GEOTECH ENGINEERS
54 - Professional, Scientific, and Technical Services
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Mar. 24, 2026
Corporate: South Park Drive Road Rehab - SURVEYING
54 - Professional, Scientific, and Technical Services
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Mar. 24, 2026
Corporate: South Park Drive Road Rehab - SWPP PLAN ONLY
54 - Professional, Scientific, and Technical Services
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Mar. 24, 2026
Corporate: Carmel Del Mar School - WSM - Survey
54 - Professional, Scientific, and Technical Services
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Mar. 26, 2026
Evaluation of Fuel Specification Changes
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 27, 2026
Corporate: Furnish Polyester Concrete Overlay \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Corporate: HMA (Type A) and Modify Signal and Lighting Systems \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 02, 2026
Corporate: HMA (Type A) and Modify Signal and Lighting Systems \u2013 Time-Related Overhead (Wday)
54 - Professional, Scientific, and Technical Services
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Apr. 02, 2026
Corporate: Kohler Elementary School Hardcourt Replacement - Erosion Control
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Mar. 27, 2026

Showing 401–450 of 5917 bids that are currently: Active.