Guillaume Talbot-Lachance


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Guillaume is a skilled regulatory commercial lawyer. He advises his clients on consumer law matters and complex legal issues relating to financial services, financial institution regulation, fintech, credit, and payment cards and mechanisms.

He also helps clients develop and adapt their business practices, including by reviewing marketing conditions for their products and services, their advertising campaigns and loyalty programs. When needed, he assists clients with e-commerce issues and drafts and revises terms of use and sale. He also guides clients in their dealings with regulators. Guillaume has considerable experience in cybersecurity risk and incident management, privacy and regulatory investigations.

Guillaume also served as a specialist in the defence of various consumer law and privacy class actions, some of them multi-jurisdictional. Always interested in new and emerging technologies, he has often been asked to develop new products and services for businesses and individuals in regulated industries and has prepared many complex commercial contracts. Guillaume was one of the lawyers responsible for coordinating the response to one of the most important data breaches in Canada. He is known for his strong communication skills and has more than ten years of experience in the legal department of one of the country’s largest financial institutions. His clients appreciate his ability to understand the realities of their business.

Beyond Our Walls

Professional Involvement

  • Lecturer, Contract and Business Law, Faculty of Political Science and Law, Université du Québec à Montréal (UQÀM)

Bar Admission & Education

  • Québec, 2009
  • Canadian Risk Management (CRM) designation, Global Risk Management Institute, 2021
  • LLM, Université Laval, 2010
  • LLB, Université Laval, 2007