John Brennan practices Commercial Litigation and provides a range of legal services, assisting clients with business, contractual and property disputes. He represents clients at all levels of court throughout Ontario as well as in the Human Rights Tribunal, the License Appeal Tribunal and other administrative adjudicative bodies.

A member of the Middlesex, Elgin, Ontario and Canadian Bar Associations, the Osgoode Society for Legal History and the Advocates Society, John is committed to serving the interests of his clients both locally and provincially.