Madeleine Dusseault

Associate | Toronto


Portrait of Madeleine Dusseault


Madeleine Dusseault maintains a broad commercial litigation practice, and achieves positive and cost-effective results for her clients in a range of practice areas. Madeleine regularly appears before the Ontario Superior Court of Justice (including the Commercial List), the Divisional Court and the Ontario Court of Appeal. Her areas of expertise include commercial contract disputes, fraud claims, debt recovery, real estate litigation, shareholder disputes, defamation and professional liability. She also has considerable experience with prosecuting and defending matters involving injunctive relief.

Madeleine prioritizes her clients’ legal and business needs, and is committed to working with clients to find practical, creative and cost-effective solutions to meet their goals.

Madeleine summered and articled at Miller Thomson, and joined the firm as an associate after the completion of her articles in 2019. During her time at law school, Madeleine worked with the Canadian Civil Liberties Association as a Donner Civic Leadership Fund Fellow, and volunteered at the Toronto Small Claims Court as a student clerk.

Notable matters

  • Canadian Urethane v. Demilec Inc., 2023 ONSC 2234 (Obtained summary judgment dismissing $5M counterclaim against officer of corporate plaintiff)
  • Bouji v. Poonai, 2021 ONSC 771, Bouji v. Poonai, 2022 ONCA 49 (Secured judgment enforcing promissory note. The matter was upheld on appeal)
  • Flex Park Inc. v. Covello, 2022 ONCA 347 (Successfully resisted appeal related to setting aside of default judgment.)
  • 1954294 Ontario Ltd. v. Crocco, 2022 ONSC 5279 (Successfully resisted motion for leave to appeal)
  • Riar et al. v. Khudal et al., 2021 ONSC 3919 (Successfully resisted motion to set aside Mareva injunction)
  • 385277 Ontario Ltd. v Gold, 2021 ONSC 4717 (Secured interlocutory injunction prohibiting online harassment of plaintiff)
  • John v. John, 2020 ONSC 5337, John v. John, 2020 ONSC 6437 (Successful on motion for interim costs in oppression proceedings. Defendant was ordered to pay $250,000.00 in interim costs.)

Community involvement

  • Student Clerk at Small Claims Court, Pro Bono Students Canada
  • Clinic Volunteer, Artists’ Legal Advice Services Clinic
  • Working Group Member, Centre for Innovation Law and Policy
  • Mentor, Peer Mentorship Program

Bar admissions & education

  • Ontario, 2019
  • University of Toronto (J.D., 2018)
  • University of Toronto (Hons B.A,Political Science, 2013)