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Jonathan Chen listen


Jonathan* developed his competitive spirit playing basketball and electronic sports, the latter of which he competed in internationally for Canada. Regularly facing high pressure moments in these activities, Jonathan now deftly controls§ and resolves problems for his clients. Jonathan has built a civil litigation practice that includes class actions, product liability, insurance, professional negligence and commercial matters. His attention to detail and considered approach helps him develop solutions to defuse the situation in a smart and practical way. Jonathan attended law school at Queen’s University where he was a Co-Editor-in-Chief of the Queen’s Law Journal. He now shares his experiences with students as a mentor at the University of Toronto. .



Jonathan Chen (he/him)

is a partner at Lenczner Slaght.

"Jon is a capable litigator and very thorough and detail oriented." — Chambers Canada

Jonathan’s litigation practice is focused on class actions, business disputes, product liability and professional negligence matters.  His clients have included financial institutions, technology companies, real estate developers and pharmaceutical companies.  He has appeared before the Ontario Superior Court of Justice, the Ontario Court of Justice, the Ontario Court of Appeal, the Federal Court as well as administrative tribunals.

Prior to joining the firm, Jonathan articled and practiced at a leading national law firm where he defended banks, automotive companies, insurers, municipalities, police services boards and educational institutions.  He also assisted on various class actions and was counsel on one of the first aggregate damages decisions in Canada.

While at law school, Jonathan was a Co-Editor-in-Chief of the Queen's Law Journal and a Teaching Assistant in Legal Writing and Research.

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  • Canadian Bar Association

  • Ontario Bar Association - Member-At-Large of the Class Actions Executive (2019-2021)

  • The Advocates' Society

  • Pro Bono Law Ontario - Duty Counsel

  • University of Toronto - New College Career Mentorship Program

  • Federation of Asian Canadian Lawyers

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  • Arbor Award (2023)

    University of Toronto

  • Best Lawyers in Canada (2022-2024)

    Corporate & Commercial Litigation

  • Canadian Legal Lexpert® Directory (2022-2024)

    Class Actions, Litigation - Corporate Commercial, Litigation - Product Liability

  • David Sabbath Prize in Labour Law: Collective Agreements and Arbitration (2012)

    Queen's University, Faculty of Law

  • Lexpert Special Edition: Canada's Leading Litigation Lawyers (2023)

  • Mentor of the Year (2024)

    Federation of Asian Canadian Lawyers

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