Expertise
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Practice Areas:
- Bar Admissions:
- Education:
- Osgoode Hall Law School (2021) JD
- University of Windsor (2018) MA (History)
- University of Windsor (2016) BA (Combined Honours – History & Political Science)
Details
- Bio
- Cases
- News & Media
Jonathan Mertz (he/him)
is an associate at Lenczner Slaght.
Jonathan maintains a broad and varied practice, including commercial litigation, arbitration, construction and infrastructure disputes, and professional liability matters as well as complex regulatory investigations. Jonathan has represented real estate developers, financial brokerages, and dozens of healthcare professionals in complex, high-stakes proceedings. He has extensive experience before the Health Professions Appeal and Review Board, where he has successfully resisted numerous appeals on behalf of regulated professionals.
Prior to joining the firm, Jonathan clerked at the Ontario Superior Court of Justice in the Central West Region. As a judicial law clerk, Jonathan gained firsthand insight into judicial reasoning as he assisted judges on motions, appeals and applications for judicial review, and a host of civil trials.
Jonathan completed his JD at Osgoode Hall Law School, placing in the top 4% of his graduating class.
Before attending law school, Jonathan studied history at the University of Windsor where he received both his BA and MA. His master’s thesis examined the role of political ideologies in shaping our writing of history.
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Counsel to a medical clinic in successfully bringing an application to quash a judicial review proceeding for lack of jurisdiction and abuse of process.
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Counsel to a physician in successfully defending a medical malpractice action through trial. The action was dismissed following trial.
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Various Health Professions Appeal and Review Board Matters
Successful resistance of over 20 appeals before the Health Professions Appeal and Review Board.
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Counsel to a physician in successfully bringing a motion for summary judgment to dismiss an action on the basis of abuse of process.
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Edgewood Health Network Inc v Joanna Anderson
Independent Supervising Solicitor for the execution of an Anton Piller order.
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1107051 Ontario Ltd v GG Kingspa Enterprises Limited Partnership
Counsel to Great Gulf, a major real estate developer, in successfully defending a large commercial litigation arising from the development of two large condominium projects in downtown Toronto, involving claims of repudiation, contested pleading amendments, and issues of settlement privilege. Great Gulf successfully resisted the Plaintiffs' motions to strike repudiation claims advanced in its counterclaim and to amend its pleadings, and was partially successful on a motion to strike portions of the Plaintiffs' claim on the basis of settlement privilege.
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Lenczner Slaght Welcomes Seven New Associates
Canada’s leading litigation firm continues to add to its collective experience and knowledge with the addition of seven exceptional associates.