In 1963, Charles E. Rochette et associés, ingénieurs-conseils is founded in La Malbaie.
The company then becomes Picard, Rochette et associés, specializing in civil engineering. To meet growing demand for municipal infrastructure and facilitate its expansion, the company moves to Quebec City.
In 1965, new associates join the firm to form Rochette, Lajoie, Grondin, Normand, Rochefort et associés.
That same decade, Rochette, Rochefort et Pineau limitée, a new player in Quebec's engineering market, is formed to promote urban development growth.
An extended period of growth begins in the late 1960s.
In 1967, Roche opens its first regional office in Thetford Mines to bring its mining development expertise to the area.
From 1963 to 1971, three new divisions are established: urban planning, transportation and environment.
In 1977, the company obtains its first contract abroad.
During that same period, Roche becomes Roche associés ltée Groupe conseil and Groupe-conseil Roche ltée.
The 1980s are a time of expansion. Roche acquires subsidiaries, creates new divisions and opens new offices.
In 1984, the company becomes Roche Ltd, Consulting Group.
In 1991, Roche builds a head office at 3075 Chemin des Quatre-Bourgeois in Sainte-Foy.
The firm’s lightning growth continues with the opening of several offices.
In 1996, Roche sets up a quality management system in compliance with the ISO 9001 standard.
In 1999, Roche signs an agreement with the US firm, The IT Group.
On November 15, 2000, Charles-E.-Rochette, the company’s founder, passes away.
In 2002, Roche Ltd, Consulting Group becomes a member of the US firm,
The Shaw Group.
June 2005, Roche becomes a Quebec company once again.
Roche doubled its workforce and sales between 2005 and 2012
In 2007, Roche Ltd, Consulting Group acquires Cadec and Toptech.
In February 2008, Roche announced the acquisition of Les Consultants FBG inc. and its subsidiary, Ombrages, as well as IMS Experts-Conseils (including PSA) and Sopax-H.M Groupe Conseil ltée.
In 2010, Roche welcomes the Noram Experts-conseil inc. team.
In May 2011, Roche acquires additional shares in A2EP, becoming its primary shareholder.
In May 2011, the firm announces its acquisition of Géomog.
In June 2011, Roche announces significant equity participation in Hydrosys.
In June 2011, Roche continues its expanding by creating a U.S. division, in Salt Lake City, Utah.
In 2011, Roche increases its international presence in Algeria and Northern Africa.
In January 2012, Roche acquires a majority stake in Seamar Engineering.