Matthew Angelus

Martin Côté is a Partner in our Civil and Commercial Litigation Group. His practice focuses primarily on civil, commercial and real estate litigation, as well as provisional measures such as injunctions and cases with international aspects raising questions on the applicable legislation, the jurisdiction of the courts and the enforcement of foreign decisions. Martin Côté is also committed to the future of RSS as a member of the Management Committee, after having been...

Thierry Dorval practises securities law and competition law. He acts in a wide range of transactions such as mergers, business acquisitions and dispositions. He is chair of our governance and directors’ liability team. Mr. Dorval frequently reviews the governance policies and practices of Canadian corporations listed on both Canadian and US stock exchanges. He also regularly advises boards and management on directors and officers’ liability issues and independent committee deliber...

Ms. Lynne Kassie is a Partner and Head of our Family Law Group. Her practice focuses on all aspects of matrimonial and family law, as well as in related fields of civil law, including succession and protective supervision. Ms. Kassie focuses her practice on complex litigation, and on cases involving high-net-worth issues, division of property and other financial issues related to business interests and trusts. Ms. Kassie also advises parties prior to their marriage or cohabitation and has ext...

Peter E. Kirby provides counsel on all aspects of cross-border trade. He advises on regulatory compliance, trade agreements, and trade remedies such as anti-dumping and countervailing duty actions. His practice extends to international commercial arbitration and investor-state arbitration, customs law, and export and import controls. Appearing before governmental and administrative agencies and the Federal Court, Peter also represents clients in appellate litigation relating to trade and cust...

Marie Lafleur is a seasoned intellectual property litigator. She regularly appears before the courts in proceedings under the Patented Medicines (Notice of Compliance) Regulations and litigation concerning pharmaceutical patent infringement or invalidity. Her expertise encompasses biologicals and biosimilars. Marie has represented numerous companies in proceedings to prevent the Minister of Health from issuing Notices of Compliance that would allow generic versions of patented drugs to be sol...

Louis Belleau has been a member of the Quebec Bar since 1981, practicing in the field of criminal and penal law. Having served as Crown counsel from 1981 to 1983, Mr. Belleau then practiced at the firms of Silver Braun, Filteau Belleau and Shadley Battista before opening his own office in 2012. Mr. Belleau has appeared before all courts of criminal jurisdiction in the Province of Quebec and, on occasion, in jurisdictions outside Quebec. He appeared many times before the Supreme Court of Canad...

David Lemieux practises corporate financing and restructuring. He regularly represents lending syndicates, borrowers and investors in the areas of project financing, public and private takeover bids, asset acquisitions, monetization, securitization, structured finance and debt restructuring, whether the financing is Canadian, cross-border or foreign. In this capacity, he organizes and leads teams of lawyers to close these transactions. He is involved in negotiating, preparing and finalizing a...

Katia Sebastiani is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Katia, 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 Katia is held by other top lawyers in the same geographic and legal practice area.

Doree Levine is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Doree, 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 Doree is held by other top lawyers in the same geographic and legal practice area.