Terrence O'Sullivan LSM

T 416 598 3556 F 416 598 3730
E tosullivan@lolg.ca

Terry is widely recognized as one of the top litigators in Canada. From high-profile individuals to large corporations, clients rely on Terry to understand their business issues from a legal perspective and expertly litigate to achieve the best possible results.

Terry maintains a broad commercial litigation practice, with particular expertise in business-related litigation including contract disputes, shareholder disputes, oppression remedies and securities litigation. He represents clients before all levels of Ontario Courts, the Federal Court, and the Supreme Court of Canada. He is frequently retained and has acted as sole arbitrator, party nominee, chair, and appointed independent fact finder in arbitrations and mediations involving important commercial matters, often of an international nature. 

Terry is an active member of the legal profession, having published more than 70 papers on diverse litigation topics and acted as the long-time host for events such as the Canadian General Counsel Awards.  He is a Fellow of the American College of Trial Lawyers and the International Academy of Trial Lawyers.  Terry is a recipient of the Law Society of Ontario’s Medal for his outstanding contribution to the legal profession, and is a recipient of the Gold Key Award for Achievement from the Osgoode Hall Law School Alumni Association.  He is also a Past President of The Advocates' Society and a Member of the Chartered Institute of Arbitrators (MCIArb).

As one of the founding partners of the firm, Terry takes great pride in its ongoing culture of exceptional litigators who are collaborative, personable and directly available to their clients.

Community Involvement

  • Sunnybrook Foundation, Director and Chair (and the 2011 Recipient of the Rose Award for Volunteer of the Year)
  • Women’s College Hospital, Past Director 
  • Toronto Rehab Hospital, Past Director

Credentials

  • Called to the Ontario Bar, 1973
  • LL.B., Osgoode Hall Law School, 1971
  • B.A., University of Toronto, 1968

Terry is frequently referred to as a leading Canadian litigator by several publications, including Who’s Who Legal Canada, Chambers Canada and Best Lawyers Canada as, inter alia, a Dean of the Canadian litigation bar, a leading litigator and a senior statesman of the litigation bar.