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Matthew Sammon listen


Matt* is recognized as a leading trial lawyer, with experience across many sectors and businesses of varying sizes, including commercial litigation, complex medical malpractice litigation and employment law. A tenacious advocate and formidable cross-examiner, Matt does§ anything to secure a positive outcome for his clients. While Matt assists beyond the courtroom, offering employment advice to clients in a number of industries, and as a presenter at continuing legal education programs, his passion for intensive advocacy means he is usually found conducting trials , regulatory hearings, and arbitral proceedings. And he does them well, achieving results for clients in the toughest cases. .



Matthew Sammon

is a partner at Lenczner Slaght.

"Matt Sammon is a warrior of a litigator. He is fearless and takes on strong cases." — Chambers Canada

Recognized as a leading and formidable trial counsel, Matthew has extensive litigation experience across a broad range of areas, including complex corporate and commercial litigation, professional liability and medical malpractice, and employment cases. He regularly conducts trials, regulatory hearings, and arbitral proceedings.

His roster of clients have included large and mid-sized corporations across a wide range of sectors, including financial services, banking, telecommunications, retail, health care, manufacturing, hospitality, and oil and gas. He also acts regularly for executives and other individuals in civil and regulatory disputes.

Matthew provides employment advice to a number of industries, and has extensive litigation experience in employment disputes, including wrongful dismissal, the enforcement of restrictive covenants, unfair competition, and the misappropriation of trade secrets. He has developed broad practical and legal experience in digital forensic investigations, including in Anton Piller injunctions and proceedings involving internet defamation and identity theft.

Matthew also has deep experience in professional regulation and medical malpractice litigation, appearing regularly as lead counsel in complex medical litigation and regulatory proceedings.

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  • Canadian Bar Association

  • Ontario Bar Association

  • The Advocates' Society

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  • Benchmark Canada (2015-2021)

    Litigation Star – Commercial, Professional Liability

  • Benchmark Canada (2019)

    Labour Employment Attorney of the Year

  • Best Lawyers in Canada (2014-2022)

    Corporate & Commercial Litigation, Health Care Law, Labour & Employment Law, Medical Negligence

  • Best Lawyers in Canada (2022)

    Toronto "Lawyer of the Year" in Medical Negligence

  • Canadian Legal Lexpert® Directory (2013-2021)

    Litigation - Corporate Commercial, Litigation - Defamation & Media, Employment Law (Employer), Medical Negligence, Professional Liability

  • Lexpert Guide to the Leading US/Canada Cross-border Litigation Lawyers in Canada (2014-2017)

    Corporate Commercial Litigation, Litigation Lawyer to Watch (2014)

  • Lexpert Rising Stars (2013)

    Leading Lawyers Under 40

  • Lexpert Special Edition: Canada's Leading Health Sciences Lawyers (2021)

  • Lexpert Special Edition: Canada's Leading Infrastructure Lawyers (2020-2021)

  • Lexpert Special Edition: Canada's Leading Litigation Lawyers (2016-2017, 2020)

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