Jaan Lilles


Jaan* has a talent for strategic thinking. With a broad commercial litigation practice, he also has extensive expertise prosecuting and defending professionals and is recognized as a leading lawyer in medical negligence cases. Jaan thinks§ , and his colleagues and clients agree, that his LLM at the University of Toronto, focusing on privacy law, enhances his administrative law practice. Whistling while he works, Jaan considers cases strategically and is highly regarded by colleagues and clients for being unflappable and professional, even in the most difficult cases with the most challenging opponents. .



Jaan Lilles

is a partner at Lenczner Slaght.

Jaan's practice embraces a diverse range of litigation: professional liability, medical malpractice, commercial disputes, franchising matters, defence of class actions, employment and administrative law. He has appeared before all levels of court in Ontario, including as lead counsel in the Court of Appeal for Ontario, Divisional Court and the Ontario Superior Court of Justice.

Jaan has also represented clients before administrative tribunals such as the Consent and Capacity Board, the Law Society, the Workplace Safety and Insurance Appeal Tribunal and the Health Professions Appeal and Review Board, as well as various committees of the College of Physicians and Surgeons of Ontario.

A keen interest in the legal theory of privacy led Jaan to pursue a Master's of Law degree at the University of Toronto, where his graduate thesis was titled "The Common Law Right to Privacy."

Show more
  • Ontario Bar Association

  • The Advocates' Society

  • Canadian Bar Association

  • University of Western Ontario, Faculty of Law - Past Adjunct Professor (2014-20160

Show more
Show more
  • Benchmark Canada (2018-2019)

    Future Star

  • Best Lawyers in Canada (2014-2020)

    Health Care Law, Medical Negligence

  • Best Lawyers in Canada (2019)

    Toronto "Lawyer of the Year" in Health Care Law

  • Canadian Legal Lexpert® Directory (2017-2019)

    Litigation - Corporate Commercial, Medical Negligence, Professional Liability

Back to top