About Mark

Mark practices commercial and civil litigation out of Waterloo, with particular attention to construction law. He has appeared before the Divisional Court, the Superior Court of Justice, and the Ontario Court of Appeal, and has experience with alternative dispute resolution. After articling with an international firm, he joined Duncan, Linton as an associate following his call to the bar in 2024. Raised in Mississauga, he earned a B.A. in philosophy from Queen's University before working in bank compliance and as a provincial offences officer, then attended the University of Ottawa's law school. There he competed on the school's 2022 Willem C. Vis International Commercial Arbitration moot team, which placed in the top 64, and won the 2023 Canadian National Negotiation Competition before finishing third for Canada internationally that summer.

Practice areas

Civil Litigation & Dispute Resolution Construction Law Bankruptcy & Insolvency Administrative & Regulatory Law Employment & Labour Law

Education & credentials

Law school
Faculty of Law at the University of Ottawa
Undergraduate
Bachelor of Arts in Philosophy, Queen's University

Listing compiled from public sources in July 2026. Confirm Mark E. Day’s licence and standing in the Law Society of Ontario directory ↗