Lidiya Yermakova


[email protected]

Lidiya is an experienced trial and appellate advocate who specializes in health law and litigation with a particular focus on complex medical negligence actions and regulatory proceedings. Lidiya has represented clients in lengthy and complex civil actions as well as proceedings before the College of Physicians and Surgeons of Ontario, Health Professions Appeal and Review Board, and matters under the Public Hospitals Act, Coroner’s Inquests and before the Consent and Capacity Board. Lidiya has also acted as counsel in successful appeals and judicial review applications before the Ontario Superior Court of Justice, Ontario Court of Appeal, and the Federal Court of Canada.

Lidiya also practices corporate-commercial litigation. Lidiya has represented regulated professionals and business in various corporate-commercial disputes, including litigation and arbitration matters.  

Lidiya serves as an instructor for the Trial Advocacy Course at Osgoode Hall Law School. In addition, Lidiya is frequently asked to speak at professional development events and seminars on trial advocacy, legal practice, and professionalism subjects.


  • Moses Beaver Inquest: Lead counsel in lengthy high-profile Coroner’s Inquest in Northern Ontario.
  • College of Psychologists of Ontario v. Ontario (Health Professions Appeal and Review Board), 2022 ONSC 1365: Counsel to regulator in successful judicial review application
  • Bilak v Attorney General of Canada: Counsel to applicants in high-profile Federal Court judicial review application challenging the decision of the Minister of Foreign Affairs of Canada regarding sanctions exemption.
  • Jajo v. Ontario (Transportation), 2021 ONSC 5227 (CanLII): lead counsel in successful application for judicial review establishing abuse of process.

Beyond Our Walls

Professional Involvement

  • Member, Ontario Bar Association
  • Member, The Advocates’ Society

Bar Admission & Education

  • Ontario, 2014
  • BA (Honours), Queen's University, 2010
  • JD, Osgoode Hall Law School, 2013