Mathews Dinsdale Welcomes Keira Ostrosser to the Firm
Mathews Dinsdale is pleased to announce that Keira Ostrosser has joined the Firm as an Associate in our Calgary Office.
September 11, 2026
Associate announcement
HHR is Pleased to Welcome Érik Arsenault
October 2, 2023
Érik is an associate at Henein Hutchison Robitaille LLP and practices both criminal and civil litigation.
Prior to joining Henein Hutchison Robitaille LLP, Érik completed his articles as a law clerk of the Court of Appeal for Ontario. He then served as a law clerk to Justice Andromache Karakatsanis of the Supreme Court of Canada.
Érik attended the University of New Brunswick Faculty of Law as a Lord Beaverbrook Scholar in Law. Érik recieved various awards, including in criminal law, constitutional law, legal writing, oral advocacy, the Law Faculty Price, and the Lieutenant Governor’s Silver Medal for the highest GPA in second and third year. While at law school, he competed in the Jessup Moot and the Sopinka Cup in trial advocacy. Before attending law school, Érik earned a Bachelor of Business Administration (hons) in Finance and Marketing from University of New Brunswick.
Henein Hutchison Robitaille LLP has been repeatedly recognized as one of Canada’s top litigation boutiques. Our practice encompasses a wide range of litigation, including criminal, regulatory, civil, and appeals in all matters. We have experience at all levels of court including dozens of appearances in the Supreme Court of Canada and hundreds of cases in the Court of Appeal for Ontario.
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Mathews Dinsdale is pleased to announce that Keira Ostrosser has joined the Firm as an Associate in our Calgary Office.
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