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Mechanical Division
Crane lifting pipes and valve assembly on civil construction site
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St. Clair boasts a 30,000 sq. ft. fabrication shop and 24,000 sq. ft. storage located on 47 acres, offering extensive pre/post-fabrication material accommodation.

Civil Division
Civil job site with excavator and cement truck
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St. Clair Civil’s experienced supervisors excel in safe, efficient construction, recently managing extensive soil removal, support construction, and cement pours for major projects.

Electrical Division
Industrial circuit breakers
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St. Clair Electrical, with 35 years of experience, manages large-scale projects with a skilled workforce, ensuring safety and client satisfaction.

Pipeline Division
Large pipeline being buried by excavators
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St. Clair serves top North American oil and gas clients, offering project management, inspection, fabrication, installation, maintenance, and testing of pipeline systems and equipment.


Established 24 years ago just outside of Sarnia, in Brigden, Ontario, St. Clair Mechanical Inc. started as a piping structural contractor and has now expanded to offer Civil and Electrical services. Our company works on mid to large scale construction of Piping, Mechanical, Civil, and Electrical installations. Our personnel have the experience and expertise to meet the technically challenging requirements for any size project, from design through to procurement and then the fabrication and installation leading to project construction completion and turnover. St. Clair Mechanical’s growing success is built on a combination of safety first, quality second and overall teamwork.


Our mandate is to provide competent and complete services to our Clients and to depend on repeat business and referrals for the bulk of our revenue.

Safety Record

Safety is our priority and the fact is impressed on our employees. The Sarnia Lambton Industrial Education Cooperative is our go to group for the majority of our employee Safety needs and training.


To maintain our client base and to not lose any current customers. To increase our client base in a controlled and capable manner and to minimize our employee turnover.

Quality Control

Our quality control group is composed of team members who hold C.W.B. I and II, T.S.S.A. G.P.I., A.P.I. 1169 and C.W.B. Welding Supervisor ticket. At times we do increase our staff members but always with the same minimum qualifications.

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