About Warren Law Group

Warren Law Group is a small law firm in London, Ontario, with roots that go back to the 1940s, when Martin Bitz began practising law in the city. Bitz earned an M.A. from the University of Toronto and a law degree from Osgoode Hall, was called to the Ontario bar in 1950, and built a litigation practice that included cases argued before the Supreme Court of Canada. The firm Bitz founded changed names more than once over the following decades, from Bitz Szemenyei Ferguson & MacKenzie to Szemenyei MacKenzie Group in 2013, before becoming Warren Law Group. The firm describes itself as having helped clients and their families for over 60 years.

Warren Law Group is led today by Ryan N. Warren, who was born and raised in London and was called to the Ontario bar in 2005 after earning a law degree from the University of Western Ontario. Dixon Winder, formerly of MacKewn Winder LLP, a London practice with roots dating back to the city's early legal history, serves as counsel to the firm. The firm practises corporate and commercial law, real estate, wills and estates, and personal injury, working with individual, family, and business clients across Ontario.

Practice areas

In the community

  • Ryan Warren serves on the board of the London Regional Children's Museum.
  • Warren coaches with the Oakridge Optimist Soccer Club.
  • Warren is a member of the Legal Advisory Service at the London Small Business Centre.
  • The firm is a member of the Middlesex Law Association and the London Chamber of Commerce.

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

Where to find them

1 Commissioners Rd E Unit #209, London, ON N6C 5Z3 · 519-433-8155

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This listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

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