Gabriel Costantini, Lawyer in St. Catharines, ON

About Gabriel

Gabriel Costantini is an associate at Sullivan Mahoney LLP practising in family law and civil litigation. He holds a Juris Doctor from Western University and a Bachelor of Science in Medical Sciences from Brock University. He joined the firm as a summer and articling student and now serves clients throughout the Niagara Region.

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This listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on their firm’s website. Confirm Gabriel Costantini’s licence and standing in the Law Society of Ontario directory ↗

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