Infrastructel
“They have the difference in our engineering project.”
Best Civil, Structural and Environmental Engineers in Longueuil, QC
16 companies listed · all 16 in Longueuil · 12 rated 4.5+
Data verified October 21, 2026
Genipro-Stnh Inc
“Professional team and excellent service in project management”
Conception D Bédard Inc
Ingénieurs Structures Coseb
“I have done several projects with Provencher Coseb and I have always been surprised by the quality of their work, their availability and their speed in responding to changes that may occur on the site during construction.”
Geniflex Inc.
“For the engineering work and installation of a steel beam in the extension of our house, the project went perfectly.”
Sismitech
“Very easy to work with and accommodating”
Listed for property owners in and around Longueuil, QC, these 16 companies do engineering work for properties. Listings show the disciplines each firm names on its own website, from structural to municipal site work and environmental assessment, with ratings and quotes from public reviews.
Area overview: Longueuil, QC
All 16 companies we list here are in Longueuil itself. 14 of the companies on this page have a rating, from 3.9 to 5.0 across 130 reviews; 12 are rated 4.5 or higher. 9 have ten or more years of experience, the longest 30 years. We have a website on file for all 16 of the companies on this page; 9 publish a contact page and 10 list a public email. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
How do I tell which firm suits a house?
Websites are listed for all 16 firms on this page. Look at project types. A practice geared to municipal infrastructure or industrial plants may not want a beam job, while a small residential structural firm will turn it round faster and cheaper. Say the scope plainly on the first call.
JPM Consultant Inc.
“They are super professional and specialized in energy saving and industrial refrigeration.”
OG Consultants
Eequinox
Fnx-Enerpro
“I had good experience with them”
Geophysics GPR International
“Working with their teams in 2007 super professional”
Rochon Experts Conseils Inc
Gph Inc
Aviya Technologies
Théta Groupe Conseils Inc.
Omniageo Inc.
Why these companies made our list
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