Thomas-Bernard studied mathematics and architecture at the University of Waterloo (B.E.S. 2004, M.Arch 2006). He then worked for offices in Canada and Spain including Philip Beesley Architect (Toronto), Coll Leclerc Arquitectos (Barcelona), Arquitectonica (Madrid), Schème and MSDL (Montréal). In 2009, he undertook a doctorate in architectural history and theory at the UCL Bartlett School of Architecture in London. His thesis on dialogue, ambivalence and public space, defended in 2013, was nominated by UCL for a research prize from the Royal Institute of British Architects. His research work has been funded by SSHRC, FRQSC, the Canada Council for the Arts, and UCL. Before joining UQAM's École de design in 2015, he taught at UCL Bartlett, Carleton University, Université Laval and Université de Montréal.
Thomas-Bernard has served on the Berkeley Prize committee since 2002, is a regular member of the Laboratoire d’étude de l’architecture potentielle (LEAP), an associate researcher to the Canada Research Chair on Small and Medium Cities in Transformation and is co-founder, with Carole Lévesque, of the Bureau d’étude de pratiques indisciplinées (BéPI).