Academy Member Inducted 2020
Map & Directions
Terrence O'Sullivan
145 King Street W
Suite 2750
Toronto, ON M5H 1J8
Recognized to Ontario Chapter for:
Civil/Commercial Mediation & Arbitration
Other ADR Services: Facilitation, Fact Finding, Med-Arb, Mini-Trial, Neutral Evaluation

Available
- Practice Commenced: 2000
- Total Mediations (as of Jun 2022): 250
- Total Arbitrations (as of Jun 2022): 80
Practice Percentages
Biographical
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.
Case Experience
- Automotive
- Banking & Finance
- Bankruptcy/Insolvency
- Business Dissolution
- Class Actions
- Commercial/Business
- Community Associations
- Competition Act
- Contract Disputes
- Debtor/Creditor
- Employment
- Environmental
- Estates & Trusts
- Family Businesses
- Franchise
- Health Care
- Insurance
- International
- Legal Malpractice
- Libel & Slander
- Mortgage Foreclosure
- Non-Profit Organizations
- Partnerships
- Product Liability
- Professional Fees
- Professional Liability
- Professional Malpractice
- Professional Negligence
- Real Estate
- Securities
- Shareholder Disputes
- Sports
- Torts
- Unfair Competition
- Venture Capital
- Wrongful Death
- Wrongful Dismissal
Education
- Called to the Ontario Bar, 1973
- LL.B., Osgoode Hall Law School, 1971
- B.A., University of Toronto, 1968
Memberships & Affiliations
- Fellow of the American College of Trial Lawyers
- International Academy of Trial Lawyers
- Recipient of the Law Society of Ontario’s Medal for his outstanding contribution to the legal profession
- Recipient of the Gold Key Award for Achievement from the Osgoode Hall Law School Alumni Association
- Past President of The Advocates' Society
- Member of the Chartered Institute of Arbitrators (MCIArb)
Rates Information
Please call for details.
Language Skills
English