Lynne Kassie, Ad. E.

Lawyer, Partner and Head of the Family Law Group


Family Law


English, French




Ms. Lynne Kassie is a Partner and Head of our Family Law Group. Her practice focuses on all aspects of matrimonial and family law, as well as in related fields of civil law, including succession and protective supervision.

Ms. Kassie focuses her practice on complex litigation, and on cases involving high-net-worth issues, division of property and other financial issues related to business interests and trusts.

Ms. Kassie also advises parties prior to their marriage or cohabitation and has extensive experience in the preparation of cohabitation agreements, prenuptial agreements and marriage contracts.

She has considerable skills in negotiation and mediation proceedings and appears regularly before the Superior Court and Court of Appeal. She has also appeared before the Federal Court and the Supreme Court of Canada on several occasions.


Recipient of the Quebec Bar’s Mérite Christine-Tourigny, 2022

Lawyer Emeritus, Quebec Bar, 2007

Fellow, American College of Trial Lawyers, 1998; President of the Quebec Province Committee, 2003–2004

Lexpert — Rated as a leading family law practitioner for several years

Benchmark Litigation: Rated as Litigation Star for Family and Matrimonial Law

Best Lawyers —  Rated as a leading family law practitioner, appearing since 2006; Montréal Lawyer of the Year in Family Law, 2021, 2018, 2016 and 2009

Rated “AV Preeminent” by Martindale-Hubbell, for ethical standards and legal ability


Lord Reading Society: President, 1989–1990

Quebec Bar: President, Comité de la journée du Barreau, 1988–1990; Director, (1999–2001); served on several committees

McGill Lecturer in Family Law, 1997–1998

Montreal Bar: Conference of Former Bâtonniers; Bâtonnière (President), 1999–2000, presided the Bar of Montreal Liaison Committee with Superior Court, Family Law Division

Éducaloi: Director, 2007–2008

Canadian Bar Association: served on several committees

Quebec Bar Foundation: Governor Emeritus

Publications and Conferences

Ms. Kassie is a sought-after speaker and writer, whose recent articles include:

“Faith in Family Law, a Practical Approach”, La révision en droit de la famille, Les Éditions Thémis Inc., 2020

“The Evolution of a Family Law Lawyer and Family Law” Lecture at Concordia University, Faculty of Arts and Science, Jurist-in-Residence 2020-2021 Conference Series

“Can we Trust the Trust? Revisiting the Consequences”, conference before the Jewish Community Foundation of Montréal, June 2014

“La saisie avant jugement de biens en fiducie dans le cadre d’une action en divorce” (Seizure before judgment in divorce proceedings), Canadian Bar Association luncheon, November 2012

“Les faits sur l’union de fait: l’affaire Éric c. Lola” (The facts on common-law relationships: the Eric v. Lola case, with Benjamin Prud’homme), annual conference of the Association de planification fiscale et financière, October 2012

Community Involvement

A lifelong Montrealer, Ms. Kassie has deep roots in her community, as evidenced by some of the many positions she held:

Jewish Rehabilitation Hospital: President, 1988–1990

Combined Jewish Appeal: Director, 2002–2006; President, Elan Division, 1988–1990

Jewish General Hospital: Director, 2001–2007

McGill University Alumni Association: Former Director and Secretary of the Executive Committee

McGill University Alumni Association of the Faculty of Arts

McGill Friends of the Library Board


Bachelor of Civil Law

University of Montréal


Bachelor of Arts

McGill University


Call to Bar