About Leo
Leo Mongillo was a student and then an associate lawyer at a boutique Toronto family law firm from 1999 until 2015, when he opened his own practice. He is certified to practice Collaborative Family Law and has represented clients at all three levels of court in Ontario, focusing on domestic contracts, divorce, custody and access, child protection, support, and property matters.
Practice areas
Listing compiled from public sources in July 2026. Confirm Leo Mongillo’s licence and standing in the Law Society of Ontario directory ↗