Sarah Firestone

Sarah Firestone

Associate, Litigation

Contact Information

tel: 416.862.4727



Sarah is an associate in our Litigation Group. Sarah’s practice includes a broad range of civil and commercial litigation matters, with a focus on risk management and crisis response and domestic and international arbitration. She has experience with internal and regulatory investigations, securities litigation, enforcement issues, anti-corruption compliance, domestic and international commercial arbitration, international trade litigation, and investment arbitration.

Sarah was previously seconded to the Enforcement Branch of the Ontario Securities Commission, worked as a legal trainee in the International Arbitration Practice Group of a major global firm in Paris, and completed a summer clerkship at the Ontario Superior Court of Justice. Active in the arbitration community, Sarah acts as Arbitration Advisor at LexisNexis Practical Guidance, coaches the Willem C. Vis International Commercial Arbitration Moot Team at Osgoode Hall Law School, and is a member of the Young Canadian Arbitration Practitioners (YCAP) Events and Policy and Advocacy Committees.

Sarah received her J.D. from the University of Toronto, obtained her M.Sc. from the University of Oxford in Global Governance and Diplomacy, B.A. (Hons.) from McGill University, and received a scholarship to complete the Certificate in Public International Law at The Hague Academy of International Law. Sarah joined Osler as a summer student in 2018 and completed her articles with the firm in 2019-2020.

  • The Edward and Emily McWhinney Foundation Scholarship
  • Women’s Law Association of Ontario/Torkin Manes LLP Trailblazer Award for her leadership role in promoting women in business, legal expertise and business acumen, and an entrepreneurial spirit

  • Volunteer Judge, McGill Moot Court Invitational Tournament (2021)
  • Arbitration Advisor at LexisNexis Practical Guidance
  • Moot Coach (2020-), Willem C. Vis International Commercial Arbitration Moot Team at Osgoode Hall Law School
  • Events Committee (2020-), Young Canadian Arbitration Practitioners (YCAP)
  • Policy and Advocacy Committee (2021-), Young Canadian Arbitration Practitioners (YCAP)

  • Law Society of Ontario
  • Women’s White Collar Defense Association
  • Young Canadian Arbitration Practitioners

  • Sources of Ethical Obligations in International Arbitration, (S. Bjorkquist and S. Firestone), LexisNexis Canada Inc., May 2021
  • Mediation-Arbitration in Canada (L. Tomasich and S. Firestone), LexisNexis Canada Inc., March 2021.”
  • Anti-Corruption Canada: Trends & Developments (S. Eljarrat, M. Aboud and S. Firestone), Global Practice Guides, 2021
  • Research Assistant to Hon. Allen M. Linden, for the 15th edition of Canadian Tort Law: Cases, Notes & Materials (2018).