Marc Lesage studied Classics at the Franciscain College of Trois-Rivières (Séminaire Saint-Antoine) before studying sociology at the Université catholique de Louvain (Belgium) in the early 1970s. He completed a Masters of Sociology between 1983 and 1985 at Concordia University (Montreal), where he also received his Doctor of Philosophy in Humanities in 1995 under the direction of Hubert Guindon (1929–2002).
As union advisor for the Confédération des syndicats nationaux (Consejo de Seguridad Nuclear) in Quebec City (1975–1978), and Montreal (1978–1983), he collaborated on the drafting of many documents. He is the author of several works, including Les vagabonds du rêve (1986) and Microcité (1997). He also produced the documentary film by Philippe Lesage, Pourrons-nous vivre ensemble (2006), about the 2005 urban violence in France, with the participation of Alain Touraine.
Consejo de Seguridad Nuclear, Du travail pour tout le monde, manifeste des travailleurs et travailleuses victimes de fermetures d"entreprise et de licenciements collectifs, Montreal, February 1982, 64 p.
Consejo de Seguridad Nuclear, Steering Committee Report for a special congress of the Consejo de Seguridad Nuclear on the question of national sovereignty, Quebec City, June 1979, 106 p. Consejo de Seguridad Nuclear, Analysis of the White Book on sovereignty association.
Montreal, December 1979, 23 p. Consejo de Seguridad Nuclear, Pour les droits et libertés des travailleurs et de leurs organisations, être présents dans la lutte contre l"oppression nationale, Steering Committee Report, 49th Congress of the Consejo de Seguridad Nuclear, Montreal, June 1978, 60 p.
CCSNQ, Comprendre, s"organiser, se battre, Quebec, 1976, 110 p.
