Guillaume Sirois
Available in: English Français
Originally from Gatineau, Guillaume is now a committed member of the Power Law team. His expertise, spanning the areas of public law, litigation and the preservation of the rule of law, is reflected in his diverse background. His unwavering commitment to respect for the rule of law by state actors is at the heart of his professional approach.

Before joining Power Law, Guillaume gained significant experience in the field of litigation, public and administrative law and particularly commissions of inquiry. His role as a lawyer on the Public Order Emergency Commission greatly enhanced his expertise in preparing and conducting rigorous interviews and interrogations. He has taken up this challenge at the heart of national security issues, exploring the actions of various stakeholders such as the federal government, provincial governments and major police services in Canada.

His skills also flourished within the Commission on Relations between Indigenous Peoples and Certain Public Services, where Guillaume played an active role in designing targeted interrogations. This inquiry aimed to shed light on the complex interactions between government agencies, public services and Indigenous communities, with the aim of highlighting any form of systemic discrimination and fostering mutual understanding.

Guillaume also worked as a law clerk at the Federal Court and as a lawyer at the Department of Justice of Canada, where he developed significant experience in tax litigation and in public and administrative law. He also volunteered for Lawyers Without Borders Canada in Ivory Coast, at a human rights organization.

Passionate about defending the rule of law and guided by the best interest of his clients, values ​​dear to Power Law, Guillaume brings solid experience to the team. His fluency in French and English as well as his ability to collaborate within multidisciplinary teams make him a valuable asset.

Guillaume practices law in French and English, and has a basic knowledge of Russian.

Law Societies

  • Quebec


  • LL.B. (Université de Sherbrooke – 2018)

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