Mark Johnson

Practice Areas

Mark’s practice focuses exclusively on resolving tax disputes. He represents many of Canada’s and the world’s largest and most sophisticated businesses at all stages of the dispute resolution process, including in tax-related civil litigation, administrative appeals, audit defence, and in proactively managing tax dispute risks. Mark has successfully acted for taxpayers at all levels of court, with the Federal Court of Appeal describing his work as "exemplary" in a 2013 judicial review application. He draws on Blakes' top-tier national tax practice to develop and execute comprehensive and practical strategies for resolving tax disputes as efficiently and favourably as possible, both in and out of the courtroom.

Mark frequently writes and presents on tax issues, and he is an active member of numerous professional organizations. He has written dozens of articles on Canadian tax matters, including in the peer-reviewed Canadian Tax Journal and the National Journal of Constitutional Law. He is on the editorial board of the journal Tax Litigation, and is a past Chair of both the Tax Court Bench and Bar Committee and the Ontario Bar Association’s Taxation Law Section. He clerked at the Federal Court of Appeal and was previously a government tax litigator with the Department of Justice.