Sébastien Thériault

Noah Boudreau is a member of the Litigation & Dispute Resolution group. His practice is primarily focused on class action, product liability, cybersecurity, consumer protection and transportation litigation matters. Noah acts regularly for internationally known corporations in the defence of significant private and class actions. Many of his cases have cross-border and international implications and Noah works closely with counsel in the U.S. and other jurisdictions to ensure strategic co...

Seasoned litigator Marc Beauchemin is a key player on Montréal’s municipal and legal scene. As Chair of De Grandpré Chait's Board of Directors and Executive Committee, Marc Beauchemin plays a central role within the firm. His legal practice has two foci. In his first area of practice, municipal law, he represents the private interests of his clients, particularly major property owners, in the context of real estate developments throughout Québec. He and his speciali...

Antoine Brylowski is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Antoine, who practices law in Montréal, Quebec, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Antoine is held by other top lawyers in the same geographic and legal practice area.

Marc Ouellet is a partner in the Labour and Employment Law Group. His practice focuses mainly on individual employment contracts (from hiring to termination of contract), labour standards, unfair competition and human rights. He has advised and represented his clients in many disputes in matters of termination of employment, violation of non-competition and non-solicitation clauses or to obtain an injunction to end illegal picketing. Mr. Ouellet also helps his clients with collective or indiv...

Peter Villani leads complex transactions with major players in the retail, ecommerce, fibre optics testing, and telecommunications sectors. With dealings in the US, South Africa, South America, Europe and Asia, Peter possesses exceptional international insight and perspective. Peter is active in the community, having been president of the Jewish Vocational Service and JVS Jewish Workshop Inc., and acting as current legal counsel to the Canadian Italian Business & Professionals Association...

Austin Del Rio is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Austin, who practices law in Montréal, Quebec, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Austin is held by other top lawyers in the same geographic and legal practice area.

Guillaume Michaud practises in the areas of insolvency and corporate restructuring and in connection with insolvency-related transactions and litigation. Guillaume represents and protects the interests of different stakeholders during corporate restructuring, distressed M&A, realization of assets or bankruptcies. The clientele he represents includes insolvent companies, trustees/monitors and receivers, purchasers and investers in a distressed M&A context, creditors, shareholders and d...

Catherine Brisebois is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Catherine, who practices law in Laval, Quebec, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Catherine is held by other top lawyers in the same geographic and legal practice area.

Imran Ahmad is a senior partner and the Canadian head of technology and Canadian co-head of cybersecurity and data privacy. He is based in our Toronto and Montreal offices and is recognized as a leading cybersecurity and privacy lawyer by several legal directories. Imran advises clients across all industries on a wide array of technology-related matters, including outsourcing, cloud computing, SaaS, strategic alliances, technology development, system procurement and implementation, technology...

Practice focuses on strategic alliances, joint ventures and mergers and acquisitions of private corporations and investment funds. In the fields of technology and computer law, expertise includes drafting computer software development agreements, licensing agreements, distribution agreements, computer and telecommunication system outsourcing agreements and electronic commerce agreements. Major files have included outsourcing computer and telecommunication systems, joint ventures, high density...