Dominic Thérien > McCarthy Tétrault > Montreal, Canada > Lawyer Profile

McCarthy Tétrault
1000 De La Gauchetière Street West
Suite 2500
Montréal QC H3B 0A2

Work Department



Dominic advises clients on all aspects of competition law, including merger control, cartel defence, abuse of dominance, and advertising and marketing practices. He has solid experience with domestic and international criminal cartel and bid-rigging investigations. He also advises on foreign investment merger review and national security issues arising under the Investment Canada Act.

From 2011 to 2013, Dominic acted as Assistant Deputy Commissioner for the Quebec and Atlantic regions with the Canadian Competition Bureau. In his role, he was responsible for criminal cartel and bid-rigging investigations, as well as investigations with respect to advertising and marketing practices.


Speaks English and French.


He currently serves on the Executive Committee of the Canadian Bar Association’s Competition Law and Foreign Investment Section, and is a former member of the Editorial Board of the Canadian Competition Law Review.

Lawyer Rankings

Canada > Competition and antitrust

McCarthy Tétrault has invested significantly in its competition and antitrust practice, and as such is well equipped to advise on the full range of matters in this field. The team often collaborates with the firm’s M&A department, providing merger control and foreign investment review services on major deals. Highlights in this space included Jason Gudofsky and Deborah Salzberger‘s advice to LSE Group on the $27bn acquisition of Refinitiv. On the investigations and litigation side it offers similar experience, having handled civil and criminal cartel investigations, deceptive advertising cases and class actions before federal courts and the Competition Tribunal. Its industry expertise is likewise broad, covering technology, transportation, financial services, real estate and other sectors. Gudofsky leads the practice from Toronto, and is known for his international work, both in foreign investment and national security reviews. Oliver Borgers is also notable for this type of work. Donald Houston leads litigation, with both civil court and class action experience. Dominic Thérien is a key contact in the Montréal office.