Margaret O’Sullivan, Artsci’78, Law’81

Principal, O’Sullivan Estate Lawyers
[Photo of Margaret O'Sullivan]

Margaret O'Sullivan has practiced estates and trusts law exclusively for more than 30 years and is the principal of O’Sullivan Estate Lawyers, a boutique firm in Toronto, which she established in 1998. Prior to establishing her firm, Margaret was a partner of Stikeman Elliott, directing its trusts and estates practice. Margaret advises clients on all aspects of private client work, including estate and succession planning; estate litigation and the administration of estates and trusts. She holds a B.A. (magna cum laude, 1978) and LL.B. (1981) from Queen’s University.

Margaret has consistently been recognized as a leading practitioner by the Canadian Legal Lexpert Directory and Best Lawyers Canada, and in 2013 received the Ontario Bar Association’s Award of Excellence in Trusts and Estates Law. Margaret is a frequent speaker and writer for various professional organizations, including the Society of Trust and Estate Practitioners (STEP), The Law Society of Upper Canada, The International Bar Association, and various private conference sponsors. She has authored textbooks for the Institute of Canadian Bankers, authors the Canada chapter in International Succession Laws and is a contributing author to Widdifield on Executors and Trustees.

She is a founding member and former Deputy Chair of STEP (Canada), as well as past Deputy Chair, Board and Council member of STEP Worldwide, and past Chair of the Ontario Bar Association’s Trusts and Estates Section. She has also served as a member of the Development Steering Committee of the Art Gallery of Ontario’s Board of Trustees. As a proud Queen’s alumna, Margaret enjoys the opportunity by her participation on Queen’s Gift Planning Advisory Committee to now give back to Queen’s.