About Michael J. O'Shaughnessy

Michael O'Shaughnessy has practised criminal law from an office in Brockville, Ontario since being called to the Bar of the Supreme Court of Ontario in 1977. The degree path included a Bachelor of Arts from McMaster University in 1972 and a Bachelor of Laws from Queen's University in 1975, followed by articling in Toronto under Michael Wadsworth before returning to practise in Eastern Ontario. Over the practice's history, the firm has appeared before the Ontario Court of Justice, the Superior Court of Justice, and the Ontario Court of Appeal, handling matters that range from impaired driving and assault to drug, firearms, and homicide charges under the Criminal Code and related federal and provincial statutes.

The office at 17 Court House Square sits in the core of historic downtown Brockville, directly across from the County Court House, and the firm's client base extends to Perth and the wider Eastern Ontario region. Before turning to law, O'Shaughnessy played football at McMaster and Queen's, a career that included a Canadian college All Star selection at defensive end in 1971 and a first round Canadian Football League draft pick, a history the firm's own website still recounts.

Practice areas

In the community

  • O'Shaughnessy is a founding member of the Leeds and Grenville Collaborative Family Law Association.
  • O'Shaughnessy serves as a director of the Lanark, Leeds and Grenville Addictions and Canadian Mental Health Association.
  • O'Shaughnessy is a member of the Brockville Rowing Club.

Good to know

A person using a wheelchairAccessible parkingA calendar with a checkmark beside a clockBy appointment

Where to find them

17 Court House Square, P.O. Box 2121, Brockville, Ontario K6V 3X3 · 613-342-2010

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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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