Mackenzie Stewart Associate Cassels Brock & Blackwell LLP Mackenzie Stewart is an associate lawyer at the Toronto office for the firm Cassels, Brock & Blackwell LLP. She works primarily in IP Litigation and has a background in regulatory and policy matters relating to copyright and cultural heritage law. Prior to joining Cassels, Mackenzie clerked at the Supreme Court of Canada, and the Federal Court of Appeal, and was legal counsel at the Department of Canadian Heritage. She has acted as counsel on matters before the Federal Court of Canada and the Canadian Copyright Board and has advised on the drafting of copyright related legislation and policy.