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
Partner announcement
Canada’s leading litigation firm is proud to welcome an exceptionally strong advocate to the partnership, Andrew Porter.
January 14, 2019
Canada’s leading litigation firm is proud to welcome an exceptionally strong advocate to the partnership, Andrew Porter
Andrew is an expert litigator committed to advancing his clients’ interests through the same excellence in advocacy that has made us Canada’s leading litigation firm. Andrew’s trial and appellate practice encompasses a range of general litigation, including commercial litigation, professional liability, and professional regulation. His clients regularly include corporations, shareholders, professionals as well as their regulatory bodies. His advice and representation has proven effective both inside and outside the courtroom. Andrew appeared as counsel in the Supreme Court of Canada in Groia v LSUC. He has also appeared at all levels of court in Ontario, the Nova Scotia Court of Appeal, and various administrative tribunals, including the Human Rights Tribunal of Ontario. Andrew uses his experience and judgment to help his clients successfully navigate complex problems in short order. A seasoned advocate, he stands tall against any challenge.
Congratulations, Andrew!
(Click here for the full announcement.)
Widely recognized as Canada's leading litigation practice, Lenczner Slaght has successfully represented clients' interests in some of the country's most complex and high-profile cases. Our lawyers are distinguished by their depth of courtroom experience, appearing at all levels of the courts, before tribunals, and in mediation and arbitration proceedings. We're also known for our wealth of talent: Lenczner Slaght partners, ranked among the best of their peers nationally, recruit and mentor gifted litigators who uphold the highest professional standards. From commercial disputes and class actions to professional regulation and cross-border matters, we bring expert strategy to all areas of litigation.
View All Announcements by This Firm
Mathews Dinsdale is pleased to announce that Keira Ostrosser has joined the Firm as an Associate in our Calgary Office.
September 11, 2026
Daoust Vukovich – A New Look. The Same Trusted Advisors.
September 10, 2026
Miller Thomson is pleased to welcome Shubhreen Dosanjh as Counsel in the Firm's Financial Services group. She is based in the Firm's Toronto office.
September 9, 2026