John David Cooke Mather

John Mather is a partner at DMG Advocates practicing commercial and public litigation.

John is a trusted advisor to several leading Canadian businesses and organizations.

John is adept on his feet in any setting. His favourite place to be is in court or a hearing room. John regularly appears before the Ontario Superior Court and Court of Appeal, as well as courts in British Columbia and Saskatchewan. He has acted in numerous domestic and international arbitrations, including in New York and Riyadh, Saudi Arabia.

John is consistently recognized as a leading litigation lawyer in Canada. John’s Chambers and Partners ranking states that John is “held in high esteem for his litigation practice, with sources applauding his advocacy skills and courtroom pedigree in high-stakes commercial and public law disputes”. John is also regularly ranked and recognized by Lexpert and Benchmark Litigation.

John’s commercial litigation work focuses on contractual disputes, shareholder claims, product liability, class actions, commercial real estate and leasing matters, franchise and automobile dealer claims, procurement litigation, and media and defamation. John also acts on urgent matters involving fraud, including successfully obtaining Mareva orders and other extraordinary relief.

John’s public litigation work focuses on public inquiries, regulatory or government investigations and defence of regulatory proceedings.