Sébastien Guy

Warren Katz is a Partner in the Corporate Group. He previously served as Managing Partner of the Montréal office and as a member of the firm’s Executive Committee and Partnership Board. Warren specializes in Canadian and cross-border mergers and acquisitions, private equity and corporate finance transactions, including representing broad and varied public and private companies across many industries. He offers over 25 years of extensive experience, including strong cross-border c...

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...

Nick Krnjevic is a Partner in our Insurance Law Group. His practice focuses on insurance law and private international law. His insurance practice includes advising on, and litigating, insurance and reinsurance issues pertaining to primary and excess CGL, E&O, D&O, EPLI, Cyber, Property, Business Interruption and Fidelity coverage. He also acts as monitoring coverage counsel in domestic and international litigation. He also advises insurance carriers on drafting issues and provides in...

Laurence Gauthier is a Partner in our Insurance Law Practice Group. Her practice focuses on insurance litigation, more specifically on professional and civil liability, insurance, latent defects and construction.

Vincent Grenier-Fontaine focuses his practice on insurance law and professional liability, particularly in conflict cases involving architects, lawyers, contractors working in the construction industry, engineers, professional technologists and pharmacists. He has experience working as a personal property and casualty insurance agent for an insurer and is a Certified Human Resources Advisor (CHRA). He has acted as a prosecutor for a public inquiry commission and regularly pleads before civil ...

Marcel Naud is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law and Privacy and Data Security Law. Marcel, 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 Marcel is held by other top lawyers in the same geographic and legal practice area.

Partner, trademark agent and head of Lavery’s Legal Lab on Artificial Intelligence (L3AI) Eric Lavallée is a lawyer and trademark agent in the Business Law Group and he runs the Lavery Legal Lab on Artificial Intelligence (L3AI) . As a result of his extensive experience in intellectual property (patents, trade-marks and software protection) Mr. Lavallée took on a special interest in developments related to artificial intelligence over the past few years. Mr. Lavallé...

Louis-Frédérick Côté is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Louis-Frédérick, who practices law in Montréal, Quebec, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Louis-Frédérick is held by other top lawyers in the same geographic and legal practice area.

Partner and Head of the Business Immigration team, Julie Lessard heads one of the largest teams of business immigration professionals in Canada. She has over 20 years of experience in this complex field. She advises both multinationals and small- and medium-sized businesses on how to attract top global talent be it to innovate, to benefit from a global knowledge or to meet specialized workforce needs. Julie develops immigration and/or global mobility strategies for several Fortune 500 compani...

Marc-André practises in the areas of administrative and constitutional law. He has developed specific expertise in judicial review, state immunity, municipal law, federal and provincial regulatory law, the division of constitutional powers and Charter rights (provincial and federal). He also advises public bodies and certain private companies on access to information, state liability and issues related to investigations and the exercise of public powers in the areas of transportation, ...