Mathieu St-Pierre Castonguay, lawyer

« We always go too far for those who are not going anywhere. »
Pierre Falardeau.

Mr. St-Pierre Castonguay, who was admitted to the Barreau du Québec in 2016, holds a master's degree in business administration and a master's degree in law with a background in applied international law and international politics.
Before joining Gauthier Bédard's team, Mr. St-Pierre Castonguay worked on a diplomatic mission, as well as in litigation with a specialized agency of the United Nations.
Back in his native region, Mr. St-Pierre Castonguay concentrated his practice in litigation, business law, administrative law and environmental law. He is also interested in the new legal challenges posed by technological development, globalization, and climate changes.
Drawing on his multidisciplinary training, Mr. St-Pierre Castonguay is able to cover various legal issues and offer innovative solutions to his clients.
Finally, being a former university athlete, Mr. St-Pierre Castonguay is distinguished by his resilience, interpersonal skills, and competitiveness.

Contact by email

Areas of expertise
Administrative law
Business law
Environmental law

Admitted to the Bar in


Masters in Business Administration (MBA)
Master's degree in law with a background in international law and international politics (LL.M.)
Bachelor of Laws (LL.B.)