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Jonathan Mertz listen

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Jonathan* is an associate at Lenczner Slaght. His practice includes a range of complex commercial and construction cases, professional liability matters, and complex regulatory investigations. Jonathan solves§ his clients’ legal problems by situating them in their wider context and focusing on the crux of the issue. Before joining Lenczner Slaght, Jonathan served as a Clerk for the Superior Court in Canada’s busiest trial court. He knows the dynamics of a trial, allowing him to tackle emerging substantive and procedural problems‡ head on. Jonathan was born and raised in Germany, but now calls Canada his home. .

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Jonathan Mertz (he/him)

is an associate at Lenczner Slaght.

Jonathan maintains a broad and varied practice, including commercial litigation, construction and infrastructure, 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.    

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 first hand 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 where he placed 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 thesis examined the role of political ideologies in shaping our writing of history.

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