About Jeffrey
Jeffrey Sack, K.C. practices labour law and acts as a union nominee on interest arbitration boards. As a litigator he argued the Lavigne case in the Supreme Court of Canada, upholding the constitutional validity of the Rand formula, and the first case upholding the right to strike under the Charter. He is an adjunct professor teaching international labour law at the University of Toronto and Associate Editor of the Canadian Labour and Employment Law Journal.
Practice areas
Listing compiled from public sources in August 2026. Confirm Jeffrey Sack’s licence and standing in the Law Society of Ontario directory ↗