The earliest examples of projects from the firm's founding members include the Post Office in Town of Mount Royal by Affleck and Michaud from 1953–1955, Pre-cut Housing for Beaugrand-Champagne in Montreal by Affleck, Michaud and Desbarats in 1954 and the Beaver Lake Pavilion on Mount Royal in Montreal by Sise and Desbarats from 1955–1958.

The first project that all members of the firm worked on together was an entry for a national competition to design the Vancouver Civic Auditorium in 1954, for which they won first place.

The firm's prospectus around 1960 stated "The aim was to establish an organization that could carry out large and complex building projects; maintain a high level professional and technical competence; and above all develop to the utmost the social and aesthetic values that represent the highest contribution of architecture to our civilization".

Other major buildings followed, including Place Bonaventure (1964–1968), two Theme Pavilions for Expo 67 (1964–1967) and the National Arts Centre in Ottawa (1965–1968).

In 2011, Senior architect Robert La Pierre was recognized by his peers of the RAIC and introduce into the Royal College of Fellow.