Susan Sack

Estate & Commercial Litigation, Professional Negligence 

Susan Sack

Susan’s litigation experience is wide ranging. She has had extensive experience in commercial, family and estate litigation. Susan has acted in complex product liability, personal injury, insolvency and commercial matters, including on behalf of disgruntled shareholders, partners, chartered banks, trust companies, Receivers, and Trustees in Bankruptcy. More recently, Susan’s practice has focused on estate litigation and solicitors’ negligence claims. All of Susan’s skills coalesce when she acts in both of these areas. She has a compassionate and sensitive approach when dealing with her clients and her background gives her a unique insight into the “big picture”.

A “Lawyer’s Lawyer”

For over twenty years, Susan has been a “lawyer’s lawyer”, selected by insurer and insured alike. Susan is Preferred Counsel for the Lawyers’ Professional Indemnity Company. She successfully navigates her clients through professional negligence claims, and potential claims, with a calm, steady and strategic approach.

Results Focused

Susan’s broad-based background provides her with a keen understanding of what clients want: a high quality, cost-effective, responsive approach that addresses their needs and interests.

Susan has appeared in all levels of court in Ontario and on countless mediations, where she has brought matters to a successful conclusion. Susan lectures frequently on litigation and risk management issues especially in the family law and estate context. Susan Sack graduated with distinction from the University of Western Ontario with a B.A. in Economics in 1982. She graduated from Osgoode Hall Law School with an LL.B. in 1985 and has been practicing since her call to the bar in Ontario in 1987. Before founding her own firm with her Law School classmate, Avra Rosen, in 2016, Susan had been a partner at two well-known boutique litigation firms in Toronto.

Susan is a member of the Law Society of Upper Canada, the Canadian Bar Association, and the Advocates Society.

Contact Susan Sack

Susan can be reached at or 416.549.1468

Susan’s assistants are Crystal Le (she can be reached at or 416-549-1467) and Susy Martins (she can be reached at