Guy Pinsonnault

McMillan - Ontario


World Exchange Plaza, Suite 2000
45 O’Connor Street
Ottawa, ON, K1P 1A4

+1 613 691 6125

Litigation Star



Practice area:

White collar crime

Guy Pinsonnault is a partner in the firm's Competition Group where he practises in Montréal and Ottawa. His practice includes the full range of competition, anti-corruption, white collar crime and Canadian business regulation, litigation and advisory work, with a particular focus on Canadian and international cartel and commercial crime matters. Prior to joining McMillan, Guy was the General Counsel, Competition Law Section, Public Prosecution Service of Canada, from 2004 to 2012. His work as the senior prosecutor at the Competition Bureau focused mainly on the prosecution of criminal cartel matters, as well as bid-rigging and fraudulent misrepresentation, in many of the major contested competition prosecutions in that period. He also provided extensive advice in the development of the Competition Bureau policies and programs in the criminal field (e.g., the Immunity and Leniency Programs) and advised on Bureau policies and practices for search and seizure, immunity and plea agreements. Guy prosecuted cases from the RCMP Commercial Crime Division, the Integrated Proceeds of Crime Unit, and the Province of Québec anti-corruption unit (UPAC).


Updated March 2022