About John
John Illingworth is a partner in Mathews Dinsdale's Toronto office, where his practice centers on workers' compensation, occupational health and safety, and labour relations. He works with employers on building safe workplaces, including drug and alcohol testing protocols and workplace investigations, and he defends companies and supervisors facing OHS charges. His experience covers workers' compensation appeals, cost transfer applications, and right of action claims. He's appeared before courts at every level and represented clients at workers' compensation boards, coroner's inquests, labour relations boards, grievance arbitrations, and human rights tribunals across Canada. John earned his LL.B. from Osgoode Hall Law School and a B.F.A. from York University, and he's been named among Canada's leading workplace safety lawyers by Best Lawyers in Canada and the Canadian Legal Lexpert Directory.
Practice areas
Education & credentials
- Law school
- Osgoode Hall Law School
- Undergraduate
- B.F.A. (Hons), York University
Listing compiled from public sources in August 2026. Confirm John Illingworth’s licence and standing in the Law Society of Ontario directory ↗