MEDIATOR
Susannah Margison
Precision and judgment where risk meets reputation.
susannah@hendlermediation.com
(416) 990-9581
Nearly 15 years
In conflict resolution
Former trial lawyer
Plaintiff and defence, private practice
Former board chair
Large interdisciplinary primary health team
Member, IAM
International Academy of Mediators
THE PRACTICE
Both sides of the table.
Susannah Margison mediates complex civil disputes and is routinely retained in medical, hospital and nursing malpractice, elder and long-term care, professional negligence and institutional liability claims. Her practice centres on matters where legal risk meets something harder to value: a professional identity, an institution's standing, or consequences that will outlast the file.
She knows these files from the inside. Before becoming a full-time mediator, she spent more than a decade as a trial lawyer, principally in private practice, acting for plaintiffs and defendants alike. She understands how claims are built, assessed and defended, and what each party must answer for once the matter closes.
Trained in health sciences before law, and with experience working in healthcare and public health settings, she understands the clinical and institutional questions in these files as well as the legal ones.
PRACTICE AREAS
Medical malpractice and healthcare
Institutional liability
Boardroom and governance
Aviation
Professional negligence
Defamation and reputational harm
Class actions and complex litigation
Private and family business
IN THE ROOM
Compassion, and a clear view of the decision.
Having tried cases for plaintiffs and defendants, Susannah understands how each side assesses risk, and she can test a position from either side of the table credibly. She comes to every matter curious rather than certain, letting the parties show her what truly stands between them. She brings compassion to the room without losing sight of the decision the parties have come to make: whether the certainty of a settlement serves them better than the risk of trial.
Trusted by plaintiffs and defendants alike, and chosen again by the counsel who represent them.
BACKGROUND
Experience and affiliations
More than a decade as a trial lawyer, principally in private practice, acting for plaintiffs and defendants
Counsel to national organizations and adviser to professionals in sensitive, high-stakes disputes
Six years on the board of one of Ontario’s largest interdisciplinary primary health teams, including as chair, and part of its risk management through the COVID-19 pandemic
Member, International Academy of Mediators, and its Artificial Intelligence Committee
Certified executive coach, Institute for Professional Excellence in Coaching (iPEC)
Honours Bachelor of Health Sciences, University of Ottawa
Schulich School of Law, Dalhousie University
Called to the Ontario bar, 2012
Have a matter in mind?
Tell us about your file and any proposed dates, and we will confirm Susannah’s availability.

