About Marc
Marc S. Tannenbaum is counsel and a former partner at KMB Law, where he headed the family law group for 25 years before stepping back to focus on his mediation practice. He has 34 years of experience in family law, including significant property disputes, business interests, and custody and support claims, and negotiates domestic contracts such as separation and cohabitation agreements. He trained as a mediator at Harvard Law School and now focuses on helping parties reach amicable, non-adversarial resolutions of family law disputes.
Practice areas
Listing compiled from public sources in July 2026. Confirm Marc S. Tannenbaum’s licence and standing in the Law Society of Ontario directory ↗