He has an Honors BA in History (University of Sherbrooke), a Master's degree in Quebec Studies (Université du Québec à Trois-Rivières), a Master's degree in Ethics (Saint Paul University) and a PhD in Ethics (Schooling) (Saint Paul University).
Roger Blanchette began his career in 1978 as a history teacher at the Sherbooke Seminary. He was then an archivist for the Eastern Townships History Society before returning to his role as professor of history at the Cégep de Sherbrooke. In 1988, he moved to the Outaouais where he became a professor, still in history, at Cégep de l'Outaouais. From 2000, in addition to teaching at CEGEP, he became a lecturer in ethics at Saint Paul University and, in 2003, lecturer in history at UQO.
In parallel with his teaching career, Roger Blanchette has accumulated the roles of host for the program of public affairs at Canal Vox from 2000 to 2014, of historical chronicler for Radio-Canada from 2000 to 2007, lecturer and guide.