About Johnstone & Cowling LLP

Johnstone & Cowling LLP is a Toronto law firm with a second office in London, Ontario. Its four lawyers act as counsel before all levels of Ontario courts and numerous administrative tribunals, including the Ontario Labour Relations Board, the Human Rights Tribunal of Ontario, and the Ontario Civilian Police Commission. The practice centers on labour and employment law, acting mainly for management and employers, along with human rights law, police law, occupational health and safety, information and privacy law, public and administrative law, civil litigation, and property assessment law, with clients including police services, police chiefs, and police services boards.

The firm's partners bring backgrounds in both policing and labour relations. Ian Johnstone worked as a police officer with Peel Regional Police before entering law and has since taught labour and employment law at the University of Western Ontario and the University of New Brunswick faculties of law. David Cowling was called to the Ontario bar in 1992, after earning a law degree from the University of Toronto and an undergraduate degree from McGill University, and has more than 25 years of experience acting for management in labour arbitration and Ontario Labour Relations Board matters. In 2016, the firm represented the Nishnawbe-Aski Police Service in a case that reached the Supreme Court of Canada.

In the community

  • Partner Ian Johnstone has taught labour and employment law courses at the University of Western Ontario and University of New Brunswick faculties of law.
  • Alexander Boissonneau-Lehner coordinated the University of Calgary's Pro Bono Students Canada program while in law school.

Good to know

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

This firm’s lawyers at a glance

Called to the bar
1992 · median 34 years in practice 1 of 4 lawyers
Law schools
University of Calgary, University of New Brunswick 2 of 4 lawyers

Offices 2

441 Jarvis Street, Toronto, Ontario M4Y 2G8

284 Dundas Street, 3rd Floor, London, Ontario N6B 1T6

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This listing was generated by AI from public sources in August 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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