| 1975 | Company is founded by Mr. Paul Fortin |
| 1984 | Termination of work in the residential sector and start of work in the commercial, institutional and industrial sectors |
| 1991 | First worksite in a remote area: a school on the Indian reserve of Obejiwan, near the Gouin reservoir |
| 1992 | Addition of Mr. Robert Lamothe as shareholder |
| 1994 | Opening of Val-d’Or branch to better serve our customers in Abitibi-Témiscamingue |
| 1997 | ISO 9000 certification |
| 1998 | First worksite in the Nunavik region: construction of the new municipal office in Quaqtaq |
| 1999 | Addition of two new shareholders: Mr. Stéphan McKenzie and Mr. Daniel Pépin |
| 2002 | Retirement of Mr. Paul Fortin, founder, after heading the company for 27 years |
| 2007 | Establishment of the air transport cooperative CoopAir to make traveling easier for our employees to the Nunavik worksites |
| 2008 | Addition of two new shareholders: Mr. Daniel Fortin and Mr. Louis Fortin |
| 2009 | Completion of a project with a LEED certification, the new police station in Victoriaville |