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
Polley Faith LLP is pleased to announce that Zachary Rosen has joined the firm as an Associate
September 19, 2024
Before joining Polley Faith as an associate, Zachary articled and summered at the firm. He is building a broad litigation practice including civil, commercial, and regulatory matters.
Zachary graduated from the University of Toronto Faculty of Law, where he was a Senior Editor on the Journal of Law and Equality, Co-Chief Justice of the Callaghan Cup Moot competition, and was a research assistant in property law and constitutional law. Zachary received the Martin L. Friedland Prize for best contribution to the law review and won the subject matter prize in Discrimination Law.
Prior to law school, Zachary completed a B.A. (Hon.) in philosophy at U of T. He is originally from Montreal.
Learn more about Zachary here.
Polley Faith LLP is a litigation firm founded by experienced trial lawyers Mark Polley and Andrew Faith. We've been tirelessly building a team of top-of-class litigators that has become the first choice of national law firms, major corporations, and regulatory organizations for complex commercial, administrative and criminal cases. Advocacy is all we do, and we do it well.
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Mathews Dinsdale is pleased to announce that Keira Ostrosser has joined the Firm as an Associate in our Calgary Office.
September 11, 2026
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