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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 5451–5500 of 5686 bids that are currently: Active.

Denotes bidding opportunities that have been amended

Ontario - CA Due Date
Stormwater Pond 38 Retrofit Project
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Data Collection Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 29, 2026
Sharon Fire Hall Feasibility Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Arena Floor Replacement
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 25, 2026
Trailhead Boardroom Renovation Architectural Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 26, 2026
Ingersoll Southwest Industrial Development
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 29, 2026
Plattsville New Well and Water Treatment Class EA
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 29, 2026
Engineering Design Services and Contract Administration for 9th Avenue East
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
Consulting Engineering Services for Sediment
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
Construction Material Reuse Hub Feasibility Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 17, 2026
Design Services, including a Memorial and Landscape Architecture services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 06, 2026
Consulting Assignment to Undertake a Comprehensive Environmental Assessment
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Aug. 04, 2026
Creek Storm Sewer Replacement and Roadway Reconstruction
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 26, 2026
Engineering Design, Construction Administration and Post-Construction Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 22, 2026
Environmental Assessment (EA) and Preliminary Design \u2013 Creditview Road
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 06, 2026
Courtice Shores Drive Realignment and Improvements
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 08, 2026
Aquatic (Pool) Dehumidification
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
Bridge and Culvert Inspection Program
54 - Professional, Scientific, and Technical Services
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Jun. 25, 2026
Preventative Electrical Maintenance
54 - Professional, Scientific, and Technical Services
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Jun. 30, 2026
Decommissioning and Disposal of a Communication Tower
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
Consulting Services for Downtown Redevelopment
54 - Professional, Scientific, and Technical Services
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Jul. 17, 2026
Raptor Centre Bird Pen Design\/Architectural Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 06, 2026
Trails Level of Service Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 10, 2026
Groundwater Model updates and Wellhead Protection area delineations
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 07, 2026
Inspections and Certifications of Backflow Preventers
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 24, 2026
OUF Booth Re-Design
54 - Professional, Scientific, and Technical Services
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Jul. 06, 2026
Landscape Maintenance Inspection and Landscape Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 29, 2026
Fire Master Plan
54 - Professional, Scientific, and Technical Services
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Jul. 15, 2026
Building Envelope and Structural Engineering Consultants
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 06, 2026
Annual Aerial, Pump and Ground Ladder Testing and Inspection
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 30, 2026
SYSTEM INTEGRATION OF SCADA SYSTEMS
54 - Professional, Scientific, and Technical Services
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Jul. 17, 2026
Development Area 2 HAMP Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 08, 2026
Inspection and Testing of Emergency Lighting Systems and Exit Signs
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 03, 2026
Rail Corridor Yard and Facility Improvements
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 08, 2026
Leaky Hydrant Survey
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jun. 26, 2026
MoveSmart and Road Safety Providers
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 29, 2026
Employment Land and Affordable Housing
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 07, 2026
Engineering, Inspection and Design Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 14, 2026
Architectural Services for High School and Elementary School
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 03, 2026
Geotechnical Materials Testing Services
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 14, 2026
Civil Engineer
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Landscape Architect
54 - Professional, Scientific, and Technical Services
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Jul. 09, 2026
Davisville Subway Trench Park Feasibility Study
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 13, 2026
Capacity Expansion of the Lindsay WPCP
54 - Professional, Scientific, and Technical Services
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Jul. 23, 2026
Signals Engineering Design Services for USRC
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 14, 2026
UV Disinfection System Upgrades
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Independent Assessment of IO Smart Buildings Program and Platform
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 09, 2026
Norval West Bypass Transportation Corridor Improvements
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 23, 2026
Winter Operations Review
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 14, 2026
Professional Engineering Services - Newtonbrook Creek Phase 1
54 - Professional, Scientific, and Technical Services
(to see the full NAICS category code login  or  upgrade)
Jul. 24, 2026

Showing 5451–5500 of 5686 bids that are currently: Active.