Mark Rubenstein

Mark is a litigation and regulatory lawyer focused on regulated sectors. He advises and represents organizations, businesses and individuals whose costs, projects or operations are affected by regulation.

He has a significant energy regulatory practice, appearing frequently before the Ontario Energy Board in utility distribution and transmission rate applications, leave to construct proceedings, policy consultations, IESO Market Rules reviews and complaints. He advises on the interpretation of codes, rules and practices, including for project approvals, regulatory requirements, strategy and risk.

He has also represented clients before the Divisional Court, Court of Appeal, and Supreme Court of Canada on appeals and judicial reviews.

Mark serves on the Ontario Energy Board’s Adjudicative Modernization Committee and on the executive of the Ontario Bar Association’s Natural Resources and Energy Law Section, which he previously chaired. He is recognized in The Best Lawyers in Canada and Chambers Canada, and was named Best Lawyers’ Energy Regulatory Lawyer of the Year in Toronto in 2023 and 2027.

Mark obtained his B.A. (Honours) from Carleton University and his J.D. from Queen’s University. He is a member of the Canadian Bar Association, the Ontario Bar Association and The Advocates’ Society.