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John Rosen
Senior Partner

Direct: (416) 507-2440
Email: johnrosen@rosenlaw.ca

John M. Rosen has practiced Criminal Law for over 49 years, representing a wide variety of clients, both individuals and corporations, in serious and complex criminal, quasi-criminal and professional discipline cases.  He has appeared in all levels of court in Ontario and the Supreme Court of Canada.  He has also appeared as counsel in the British Columbia Supreme Court and Court of Appeal, the Nova Scotia Court of Appeal, the United States Federal Court (in New York City, Buffalo, N.Y. and Harrisburg, Pa.) and the Grand Court of the Cayman Islands.

John is a recipient of the Law Society Medal (2010), the Osgoode Hall Law School Alumni Gold Key Award for Achievement (2017) and the G. Arthur Martin Criminal Justice Medal awarded by the Criminal Lawyers Association (2018).

John is a long-standing member of the Criminal Lawyers Association, where for many years served as its Treasurer and later as a Vice-President, and the Advocates’ Society, where he has served twice as a Director.  He also has a long affiliation with the National Association of Criminal Defence Lawyers (U.S.), and the Canadian and American Bar Associations.

Throughout his career, John has been actively involved in Continuing Legal Education and has appeared as a guest lecturer, presenter, speaker and panelist for numerous legal and non-legal organizations, associations and law schools in Canada and the United States.  He currently leads a free private seminar on cross-examination for young lawyers, and provides mentorship to young trial and appellate lawyers practicing in the Greater Toronto Area.

John M. Rosen received an LL.B. from Osgoode Hall Law School in 1968 and was called to the Bar of Ontario in 1970.

John M. Rosen, a Fellow of the American College of Trial Lawyers and recipient of the Law Society Medal, has practiced as a trial and appellate lawyer in the areas of criminal, regulatory and discipline law for over 40 years. He has represented a wide variety of clients, both individuals and corporations, in all levels of court in Ontario and at the Supreme Court of Canada. He has also appeared as counsel in the United States Federal Court, the British Columbia Supreme Court, the British Columbia Court of Appeal, and the Grand Court of the Cayman Islands. John has represented over 300 individuals charged with murder, including Paul Bernardo, and has appeared in some of the most highly publicized and complex criminal cases in Canadian legal history, including:

John is regularly involved in several complex criminal and quasi-criminal cases, some of which are the subject of intense media scrutiny. These have included the trial of a Toronto Police Service officer who is one of five officers charged with corruption, and the appeal from a first degree murder conviction arising from the shooting death of Nadia Gehl in Kitchener.John contributes to the community by providing legal services to indigent persons pro bono and under Legal Aid Ontario in selected cases, and by volunteering with a number of non-government organizations.

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