Mathieu was appointed Science Director of the International Science Council in July 2018, having previously served as Executive Director of the International Social Science Council (ISSC) since November 2015. Mathieu holds a PhD from the Humboldt University in Berlin, Germany. He previously taught history, political theory and industrial relations at Université du Québec à Montréal, and Université de Montréal. Mathieu Denis was a post-doctoral researcher on the 2010 World Social Science Report on Knowledge Divides, and later joined the ISSC in 2012 as Science Officer. Prior to joining the ISSC, Mathieu Denis worked as researcher at the Berlin Social Science Centre and the Canadian Centre for German and European Studies.