About Susannah Margison
Mediator. Lawyer. Conflict Strategist.
Based in Toronto and working internationally, Susannah Margison helps professionals, executives, and private clients resolve high-stakes conflict with clarity and composure..
The Work
Susannah Margison is a mediator with Hendler Mediation, one of Canada’s most respected mediation firms, and the founder of a private conflict strategy practice serving professionals and organizations globally.
Her work spans complex civil mediation—including medical malpractice, institutional abuse, and healthcare-related class actions—and private conflict advisory for individuals and organizations facing high-stakes or reputationally sensitive disputes.
With nearly fifteen years of experience in litigation, mediation, and executive coaching, Susannah brings rare depth. She understands not only the legal realities of conflict but also the psychological patterns that determine how people communicate, negotiate, and decide.
The Philosophy
Conflict is not failure. It is a point of definition. A moment that reveals what matters most and how people choose to lead through pressure.
Susannah approaches her work through the lens of strategic integrity: the belief that doing what’s right, and doing it well, is the most effective form of conflict resolution. Her goal is not just resolution, but resolution that protects dignity, reputation, and self-respect.
To her, composure is not personality; it is strategy. The ability to stay centered when everything feels at risk is both the skill and the signal of effective leadership.
The Practice
Through Hendler Mediation, Susannah mediates complex civil disputes requiring both legal precision and human understanding. She is trusted by leading law firms across Canada for her preparation, fairness, and ability to move cases toward resolution without losing control of tone or process.
Through her private practice, she supports executives, founders, and families navigating conflict behind closed doors, where professional and personal stakes often intersect. Her private offerings include:
Private Conflict Advisory – one-hour consultations for immediate clarity and next steps.
Strategic Intensives – three-hour deep dives to prepare for negotiation, mediation, or high-stakes decision-making.
Discreet Resolution Facilitation – a structured yet flexible process for resolving complex issues outside of litigation.
Colleagues describe her presence as steady and disarming, a rare combination of composure and candour that moves people toward resolution.
The Credentials
J.D., Barrister & Solicitor (Ontario) – Called to the Bar in 2012
B.Sc. (Hons.) in Health Sciences
Certified Executive Coach with advanced training in conflict management and leadership psychology
Over a decade of experience in litigation and mediation
Trauma-informed and neurodiversity-aware
Featured as a conflict expert on The Globe and Mail, CP24, Breakfast Television, and CBC Radio
The Invitation
When the stakes are high, clarity is power.
Susannah works with clients across Canada and internationally.
Every conversation begins in confidence.