Mary Paterson

Mary is a partner in Osler, Hoskin & Harcourt LLP’s Litigation Practice Group and cross-appointed to the Taxation Group; her commercial litigation practice focuses on complex tax litigation, insolvency, and contract disputes where she represents clients in business-critical matters to find pragmatic solutions. Mary has appeared in the Ontario Court of Appeal, the Ontario Divisional Court, the Ontario Superior Court (including the Commercial List), the Federal Court of Appeal, the Federal Court, the Alberta Court of Appeal, the Alberta Court of King’s Bench, the British Columbia Court of Appeal, the British Columbia Supreme Court, the Manitoba Court of King’s Bench, the Supreme Court of Newfoundland and Labrador, and the Tax Court of Canada. Prior to joining Osler, Mary clerked at the Court of Appeal for Ontario. She worked to establish several pro bono programs and has appeared in the Court of Appeal on a pro bono basis numerous times. She is widely renowned within the industry and has been recognized by Lexpert, Benchmark Litigation, and Acritas Stars.