About Markson Law Professional Corporation

Markson Law Professional Corporation is a small criminal and regulatory defence firm at 365 Bay Street in downtown Toronto, and the firm's site says it has been operating in the city for over thirty years. Founder Joseph Markson was called to the Ontario Bar in 1992 after articling at Davies Ward & Beck, and holds an LL.M. from Trinity Hall, Cambridge University. A Harold G. Fox Education Fund Scholarship then funded a year of barrister training across three commercial chambers at London's Middle Temple, including marshal postings to High Court judges at the Old Bailey and the Cardiff courts. From 1995 to 2021, Markson worked as an Agent of the Public Prosecution Service of Canada, prosecuting organized crime, tax evasion, white collar crime, and controlled substance cases before moving into defence work full time.

The practice today covers criminal litigation, white collar crime and tax evasion, regulatory litigation, crisis and risk management, and the law of policing, representing officers and police associations in internal investigations and discipline hearings. The team includes special counsel Kate Robertson, a former law clerk at the Supreme Court of Canada and past federal and provincial prosecutor, and Madeleine Ross, who practises criminal and regulatory litigation at both the trial and appellate level.

Practice areas

In the community

  • Joseph Markson serves as President of The Harold G. Fox Education Fund, a Toronto based charity established in 1966 that sponsors legal exchanges between recently called Canadian lawyers and English barristers at the Inns of Court in London, and makes annual donations to several Canadian law schools to support their law faculties.
  • Kate Robertson is a past director of Human Rights Watch Canada and has done pro bono work for the Canadian Civil Liberties Association, the Criminal Lawyers' Association, and the Canadian Internet Policy and Public Interest Clinic.
  • Kate Robertson is a past chair of The Advocates' Society's Criminal Law Practice Group and serves on the Criminal Lawyers' Association's Litigation and Law and Technology committees.

Good to know

A person using a wheelchairAccessible parkingA 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 3 lawyers

Where to find them

365 Bay Street, Suite 811, Toronto, Ontario M5H 2V1 · 416-366-0050

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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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