Gibson Tanner Rabin LLP is a mid-sized Ottawa law firm founded in 2024 by partners Russell Gibson, Jason Rabin, and Harland Tanner, drawing on legal practices with roots in the Ottawa community spanning more than 50 years. The firm organizes its practice around four pillars: corporate and commercial law, real estate law, wills and estates, and litigation and family law, supported by associates, counsel, and licensed paralegals. It's based in downtown Ottawa near the courthouse district and serves clients in English, French, Italian, German, Sinhala, Tamil, Mandarin, and Arabic.

Practice areas

Business & Corporate Law Real Estate Law Wills, Estates & Trusts Civil Litigation & Dispute Resolution Family Law Immigration Law Administrative & Regulatory Law Insurance Law Landlord & Tenant Construction Law Employment & Labour Law

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

Lawyers 11

Chantale Cousineau-Mahoney Associate Business & Corporate LawWills, Estates & Trusts Elsa Zhang Associate Wills, Estates & TrustsBusiness & Corporate Law Guy Mattar Associate Wills, Estates & TrustsReal Estate Law Harland Tanner Partner and Co-Founder Real Estate LawWills, Estates & Trusts Jason Rabin Partner and Co-Founder Civil Litigation & Dispute ResolutionInsurance Law John Piazza Counsel Real Estate LawBusiness & Corporate Law Kourosh Bakhtiari Associate Business & Corporate Law Maya Hanna Associate Lawyer Real Estate LawBusiness & Corporate Law Melissa Eberly Associate Lawyer Immigration LawFamily Law Russell Gibson Partner and Co-Founder Business & Corporate LawReal Estate Law Sarah Peiris Associate Business & Corporate LawWills, Estates & Trusts

This firm’s lawyers at a glance

Called to the bar
1972–2024 · median 14 years in practice 9 of 11 lawyers
Law schools
University of Ottawa (6), Osgoode Hall Law School, Queen's University, University of Toronto 9 of 11 lawyers
Languages on the roster
Arabic, English, Farsi, French, Mandarin, Sinhala, Spanish, Tamil

Who handles what

Where to find them

225 Metcalfe St #600, Ottawa, ON K2P 1P9 · 613-238-2244

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Law Society of Ontario directory ↗