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About us

A merge at the heart of major industrial projects

Experienced engineers Réal Griffin and Pierre Goulet have been at the head of Manesco Constructeurs Inc. since 1992. Today, their Saguenay–Lac-Saint-Jean-based company is known across Quebec for the quality of their civil engineering work.

For the past few years, the company has combined its concrete structure expertise with its tubular system scaffolding service (Service d’échafaudage Manesco Inc. or SEM Inc.), as well as with its mechanically fabricated steel parts (MYK Fabrication Inc.) and the installation of steel structures (Acier MYK inc.).

Versatile, Manesco offers turnkey service,  taking care of each step of complex industrial projects.

Our history

1981

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Foundation of Monteurs d’acier MYK in Jonquière.

1992

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Manesco is founded in Chicoutimi

2000

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Building of the plant on 2450, Alexis-le-trotteur street in Jonquière, where the head office is still located today.

2008

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2013

Awarded 5 OH&S recognition awards while building the AP-60 Rio Tinto Alcan Smelter.

2009

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Rebuilding of the world’s largest wooden water intake pipe.

2011

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SNC-Lavalin and Hatch become a joint venture.

2011

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With the Acier MYK Inc, MYK Fabrication Inc and Location MYC Inc divisions, Groupe MYK is created.

2014

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Groupe MYK purchases the derelict plant on 2480, Alexis-le-trotteur street to increase production.

2016

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A consortium is formed for a major project: restoring an anode baking furnace.

2018

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Service d’Échafaudage Manesco is founded

A Hydro-Québec dam is demolished, a first for the government corporation.

2019

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Acquisition of Groupe MYK, who specialize in the steel industry, to help diversify Manesco’s product offer.

2021

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Groupe MYK’s 40th anniversary.

2022

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Manesco’s 30th anniversary.

2023

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