Marie Henein


Ms. Henein’s experience includes a wide range of complex litigation including criminal, quasi-criminal, regulatory as well as select civil litigation including class actions and commercial matters – representing individual, corporate and institutional clients both at the trial and appellate level. Ms. Henein has argued at all levels of court, frequently including the Ontario Court of Appeal and the Supreme Court of Canada. Ms. Henein has been counsel on numerous high profile cases.


Ms. Henein received her LL.B. in 1989 from Osgoode Hall Law School and her Masters in Law from Columbia University in 1991. She is certified by the Law Society of Ontario as a Specialist in Criminal Law. Ms. Henein is the Past President of The Advocates’ Society (2010-2011). She is a fellow of the American College of Trial Lawyers and served as a member of the Board of Directors of the Law Commission of Ontario. She is one of the founders of the Court of Appeal’s Appellate Duty Counsel Program.


Ms. Henein is a frequent lecturer. She was an Adjunct Professor at Osgoode Hall Law School where she was co-chair of the Masters of Law Program. She frequently lectures at the Law Society of Ontario, The Advocates’ Society, the Ontario Bar Association, Criminal Lawyers’ Association and the National Judicial Institute in numerous areas including trial advocacy, evidence, appellate advocacy and substantive criminal law. Ms. Henein recently delivered the prestigious Bernard Cohn Memorial Lecture at the University of Windsor Faculty of Law.


Ms. Henein is co-editor of Martin’s Criminal Code, Martin’s Annual Criminal Practice, and Martin’s Related Criminal Statutes. She is the Associate Editor of the Canadian Criminal Cases.


Ms. Henein has been selected by her peers to be included in the 2010 list of Best Lawyers in Canada with the specialty of Criminal Defence. Ms. Henein is the recipient of the 2013 Laura Legge Award and has repeatedly been named one of Canada’s 25 Most Influential Lawyers by Canadian Lawyer Magazine. In 2017, Ms. Henein was the recipient of The Law Society Medal for outstanding service to the administration of justice.


Called to the Ontario bar in 1992