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Did Claude Cossette found the Cossette agency?
Yes. Université Laval's Faculté des lettres et des sciences humaines staff directory lists him as "Président-fondateur de Cossette Communication Marketing" from 1964 to 1982, and states that he founded the agency and presided over it "jusqu'à ce qu'elle devienne la plus importante agence de publicité au Québec" (Université Laval FLSH staff directory, checked 2026-09-21). Note that the agency's own site dates the company to 1972 with a founding location of Québec (cossette.com structured data, checked 2026-09-21), which does not match the 1964 start date Université Laval gives.
What does Claude Cossette do now?
He is listed as professeur associé and professeur émérite in the Département d'information et de communication at Université Laval, with an office in the Pavillon Louis-Jacques-Casault (Université Laval FLSH staff directory, checked 2026-09-21). He teaches and writes on advertising, visual communication, creativity and ethics.
Is he still involved in the Cossette agency?
No. Université Laval's directory ends his time at the agency in 1982 (Université Laval FLSH staff directory, checked 2026-09-21). Le Soleil, 2010-01-13, described him as a professor of advertising and marketing at Université Laval and founder of the Cossette agency, writing as an outside critic of the Quebec advertising industry rather than as an executive there.
What has he written?
His books include Les Images démaquillées (1983), La Publicité en action (1987), La Créativité en action (1990) and Éthique & publicité (2009), per the Université Laval FLSH staff directory (checked 2026-09-21). The same page notes he received the Gold Medal Award, described there as the highest decoration of the Canadian advertising industry.