Mark is a tax partner and leads Osler’s tax group in Montréal. He is the immediate past Chair of the Canadian Tax Foundation (Canada’s leading organization for tax professionals) having occupied the office of chair of the Board of Governors of the CTF in 2019 and is currently a member of its executive committee. Mark frequently advises on some of the most important business transactions and critical tax disputes. His practice is broad based, focusing on domestic and international tax- planning, cross-border and domestic mergers and acquisitions, corporate reorganizations, ﬁnancings and tax dispute resolution. Mark has extensive experience in advising Canadian and foreign multi-national corporations, private equity funds, venture capital funds and privately owned businesses. Mark also has significant expertise in advising private family enterprises and family offices on succession and estate planning.
Mark is recognized as one of Canada’s preeminent tax lawyers. He was named "Lawyer of the Year" for 2019 by Best Lawyers in Canada and he is consistently recognized as a leading lawyer in Chambers Global, Lexpert, The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada and The Lexpert Guide to Leading US/Canada Cross-Border Corporate Lawyers in Canada, International Who’s Who of Corporate Tax Lawyers, Best Lawyers in Canada for Corporate Tax, Trusts & Estates, among others.
Mark is a frequent speaker and author having published numerous papers on a range of topics including corporate tax, tax litigation and estate planning. Mark has the distinction of being awarded the Douglas J Sherbaniuk distinguished writing award for his paper “Subsection 55(2): Then and Now” delivered at the 2012 annual CTF conference. He is also currently editor-in-chief of the Corporate Groups & Structures Journal and is an editor of the Personal Tax and Estate Planning Journal, both published by Thomson Reuters.