The Honourable Thomas R. Lederer

The Honourable Thomas Lederer is an arbitrator and mediator with ADR Chambers.

Mr. Lederer recently retired from the bench after 16 years where he conducted a broad range of civil trials and applications involving commercial transactions, product liability, estates and constitutional issues.  Mr. Lederer was known for his work in a variety of specialized proceedings, including judicial review, human rights inquiries, inquests, professional discipline, labour relations, environmental assessments, development and municipal law hearings. Much of this work has been connected to municipal and provincial government. This has led to his participation in a variety of significant matters involving the public interest. In this work, the interest of Mr. Lederer has centred, not only on the subject-matter of these proceedings, but on the methods and mechanics available to resolve these disputes.

Mr. Lederer has written and lectured broadly. Early in his career he taught civil procedure at the bar admission course and was a guest instructor at the Intensive Trial Advocacy Workshop at Osgoode Hall Law School. He has contributed to the Law Society Special Lectures, presented to the Municipal Law section of Ontario Bar Association, to law firms and groups not directly related to the practice of law.

Mr. Lederer, in company with his colleague, Justice Paul Perell, taught: “Contemporary Issues in Civil Litigation: Jurisdiction and the Rule of Law” in LL.M Programme in Civil Litigation and Dispute Resolution at Osgoode Hall Law School (2011, 2014).

Mr. Lederer graduated from Osgoode Hall Law School in 1973 and was called to the bar in 1975. Before being appointed to the bench, he was a lawyer for more than 30 years. He began his career with the Attorney General of Ontario and from there moved to three private firms: Osler Hoskin & Harcourt LLP, Genest Murray LLP, and Davis LLP (now DLR Piper LLP). Mr. Lederer’s practice focused on civil litigation with an emphasis on administrative law, municipal law, and environmental law.

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