Matthew Mendelsohn is the founding director of the Mowat Centre, a Canadian public policy think tank, and a former Canadian civil servant. He was the deputy minister of the Ontario government's Ministry of Intergovernmental Affairs and also the Associate Secretary of the Cabinet. As Deputy Minister, he led the creation of Ontario's Citizens' Assembly on Electoral Reform (Ontario). From 1996 to 1998, he served as a senior advisor in Canada's Privy Council Office, directing public opinion research activities for the Ministry of Intergovernmental Affairs.
Mendelsohn is co-editor of Referendum Democracy: Citizens, Elites, and Deliberation in Referendum Campaigns (Palgrave, 2001). He has been published widely on the media, public opinion, elections, public participation and public consultations, democratic reform, Quebec nationalism, globalization, health care policy, and Canadian and Quebec politics. He also serves on the board of directors of the Developing Countries Farm Radio Network and the Serve Canada youth service organization.