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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 5934 bids that are currently: Active.

Denotes bidding opportunities that have been amended

California - US Due Date
PCH Wastewater Project
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Professional Planning Consulting Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 27, 2026
Airport Master Plan Preparation
54 - Professional, Scientific, and Technical Services
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Apr. 27, 2026
Corporate: IMPERIAL COUNTY AT VARIOUS LOCATIONS ROUTE - Lead Compliance plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Corporate: IMPERIAL COUNTY AT VARIOUS LOCATIONS ROUTE - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 09, 2026
Water Quality Testing Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
May. 05, 2026
Corporate: Perform Partial Depth Recycling and Place HMA \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 22, 2026
Corporate: Perform PDR, replace AC surfacing, and place RHMA-G Overlay \u2013 Lead Compliance Plan
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 21, 2026
Civil Engineering Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 14, 2026
Storage Tank Inspections and Training Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 30, 2026
Corporate: Welbe Health - West Covina Senior Care PACE - Surveying
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: Welbe Health - West Covina Senior Care PACE - SWPPP
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: Widen 2 Lane Conventional Highway \u2013 Lead Compliance Plan Ls 1
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Inspector of Record Outdoor Learning Center GAE
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 03, 2026
Notice of Intent \u2013 TMPC Core Subsystems \u2013 BAE Systems
54 - Professional, Scientific, and Technical Services
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Apr. 09, 2026
Engineering Services
54 - Professional, Scientific, and Technical Services
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Apr. 03, 2026
Design-Build Services
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Multi-Disciplinary Engineering
54 - Professional, Scientific, and Technical Services
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Apr. 17, 2026
Construction Management and Inspection Services
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Public Works Services
54 - Professional, Scientific, and Technical Services
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Apr. 24, 2026
Construction Management, Construction Inspection and Materials Testing Services
54 - Professional, Scientific, and Technical Services
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Apr. 22, 2026
Deep Dewatering Wells (DDW) 1 to 6 Permanent Power Geotechnical Engineering
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Corporate: Clean & Paint Str Steel Br., Salvage Traveler, Fender and Pier Repair - Inspection Access
54 - Professional, Scientific, and Technical Services
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May. 05, 2026
Corporate: Clean & Paint Str Steel Br., Salvage Traveler, Fender and Pier Repair - Level 2 Critical Path Method Schedule
54 - Professional, Scientific, and Technical Services
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May. 05, 2026
Corporate: Rodeo Fiberized Slurry Seal, Overlays, and Curb Ramps - SWPPP
54 - Professional, Scientific, and Technical Services
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Apr. 21, 2026
Corporate: Manzanita Public Charter Modernization and New Construction - Commissioning
54 - Professional, Scientific, and Technical Services
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Apr. 08, 2026
Construction Cost Estimating Services
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Design-Build Services for the LBT1 Electrification Infrastructure
54 - Professional, Scientific, and Technical Services
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May. 20, 2026
Corporate: Manzanita Public Charter Modernization and New Construction - Survey
54 - Professional, Scientific, and Technical Services
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Apr. 08, 2026
Strax\/Hiperwall\/AV Support Services- Greater Los Angeles VA Healthcare System
54 - Professional, Scientific, and Technical Services
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Apr. 07, 2026
Auto Mall:NEXT Master Plan
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Architectural Services
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Taxiway A, B, and C Rehabilitation and Runway 7-25 Redesignation
54 - Professional, Scientific, and Technical Services
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Apr. 23, 2026
Professional Engineering and Plan Check Services
54 - Professional, Scientific, and Technical Services
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Apr. 20, 2026
ELECTRICAL ENGINEERING SERVICES
54 - Professional, Scientific, and Technical Services
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May. 05, 2026
Real Estate & Design Consulting Services
54 - Professional, Scientific, and Technical Services
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Apr. 15, 2026
Provide Professional Engineering Services
54 - Professional, Scientific, and Technical Services
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May. 04, 2026
ARCHITECTURAL SERVICES
54 - Professional, Scientific, and Technical Services
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Apr. 10, 2026
Corporate: Roadway Excavation, HMA (Type A), Minor Concrete and Lighting System \u2013 SWPPP
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 Dust Control 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 Pre\/Post Construction Surveys
54 - Professional, Scientific, and Technical Services
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Apr. 07, 2026
Corporate: Widen 2 Lane Conventional Highway \u2013 Lead Compliance Plan Ls 1
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 07, 2026
Corporate: Widen 2 Lane Conventional Highway \u2013 Time-Related Overhead (Wday) Wday 320
54 - Professional, Scientific, and Technical Services
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Apr. 07, 2026
Corporate: ALTIMIRA MS SEISMIC IMPROVEMENTS - Survey Staking
54 - Professional, Scientific, and Technical Services
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Apr. 16, 2026
Corporate: CONSTRUCTION ON STATE HIGHWAY IN SAN BERNARDINO COUNTY IN AND NEAR NEEDLES - EROSION CONTROL (TYPE D)
54 - Professional, Scientific, and Technical Services
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Apr. 15, 2026
Corporate: CONSTRUCTION ON STATE HIGHWAY IN SAN BERNARDINO COUNTY IN AND NEAR NEEDLES - LEAD COMPLIANCE PLAN
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 15, 2026
Corporate: CONSTRUCTION ON STATE HIGHWAY IN SAN BERNARDINO COUNTY IN AND NEAR NEEDLES - SWPPP\/WPCP
54 - Professional, Scientific, and Technical Services
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Apr. 15, 2026
Corporate: 2026 Pioneer Trail Waterline Project - SURVEYING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 23, 2026
Corporate: Yolo County North of Route 505\/5 Separation - ANALYTICAL TESTING
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 14, 2026
Corporate: Yolo County North of Route 505\/5 Separation - GEOTECH ENGINEERS
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Apr. 14, 2026

Showing 501–550 of 5934 bids that are currently: Active.