About Tanner & Guiney

Tanner & Guiney is a small Toronto litigation firm founded in November 1996 by Robert (Bob) Tanner and David Guiney. It's built around commercial and personal litigation, representing individuals and businesses in Ontario's superior and appellate courts, with a focus on legal work for credit unions. Robert Tanner has practiced civil litigation in Toronto since 1979, handling bankruptcy and insolvency, professional liability, employment, and banking and commercial disputes, and has acted as counsel to Credit Union Central of Canada, Credit Union Central of Ontario, and credit unions across the province. Tanner graduated from Osgoode Hall Law School of York University and was called to the bar in 1979.

David Guiney, the firm's co-founding partner, practiced corporate and commercial law there from 1996 until leaving the practice of law in 2008. Guiney served as general corporate counsel to Credit Union Central of Canada and Credit Union Central of Ontario and advised credit unions on share offerings, mergers and acquisitions, and lending matters. Over the years, the firm's lawyers wrote and spoke regularly for the Credit Union Professionals Association and Credit Union Central of Ontario, on subjects ranging from privacy legislation to the Bankruptcy and Insolvency Act.

Practice areas

Not listed

Milestones & recognition

  • Founded in November 1996 by Robert (Bob) Tanner and David Guiney.
  • Robert Tanner is a graduate of Osgoode Hall Law School of York University and was called to the bar in 1979.
  • David Guiney, the firm's co-founding partner, earned a Bachelor of Arts from the University of Toronto in 1985 and an LL.B. from McGill University in 1989, and was called to the bar in 1991. Guiney practiced at the firm from its founding until leaving the practice of law in 2008.
  • David Guiney represented the firm at the First International Co-operative Alliance Asia-Pacific Co-operative Forum in Singapore in June 2000, presenting on legislative adaptation in the Canadian co-operative sector.

In the community

  • Robert Tanner has published articles on credit union law in Legal Briefs (Credit Union Central of Ontario) and CUPA Exchange (Credit Union Professionals Association), on topics including auditors' liability, privacy legislation, and the Personal Property Security Act.
  • Robert Tanner has been a frequent speaker on bankruptcy, lending, and employment law at conferences of the Credit Union Professionals Association and Credit Union Central of Ontario.
  • David Guiney published on Canadian co-operative financial governance, including a 1999 study on international co-operative financial structures prepared for a Credit Union Central of Canada national initiative project.
  • David Guiney was a member of CCH's Corporate Law Advisory Board.

The neighbourhood

Tanner & Guiney's office is located at 1100-20 Bay Street, Toronto, ON M5J 2N8. The firm describes it as a downtown Toronto office, from which it handles commercial and personal litigation, representing individuals and businesses in Ontario's superior and appellate courts, along with legal work for credit unions across the province.

Frequently asked questions

What kind of legal work does Tanner & Guiney handle?
The firm's practice centers on commercial and personal litigation in Ontario's superior and appellate courts, including bankruptcy and insolvency, professional liability, employment, and banking and commercial disputes. It also provides ongoing legal counsel to credit unions across Ontario.
Does Tanner & Guiney represent credit unions?
Yes. The firm has advised credit unions across Ontario since it was founded in 1996, and Robert Tanner has acted as counsel to Credit Union Central of Canada and Credit Union Central of Ontario.
How long has Tanner & Guiney been practicing in Toronto?
The firm was founded in November 1996. Robert Tanner has practiced civil litigation in Toronto since being called to the bar in 1979, well before the firm opened.
I'm dealing with a bankruptcy or insolvency matter. Can Tanner & Guiney help?
Bankruptcy and insolvency is one of the firm's litigation areas, along with professional liability and banking and commercial disputes. Contact the firm directly to discuss your situation.
How big is Tanner & Guiney?
Tanner & Guiney is a small litigation practice founded by two partners in 1996. Robert Tanner continues to practice at the firm; David Guiney, the firm's co-founding partner, left the practice of law in 2008.
How can I contact Tanner & Guiney?
You can reach the firm's office by phone at 416-862-7745 or by email at rgtanner@tannerguiney.com.

Where to find them

130 Adelaide Street West, Suite 3425, Toronto, Ontario M5H 3P5 · 416-862-7745

Similar firms in City of Toronto

Founders LLP

9 lawyers

Founders LLP is a boutique corporate law firm on Bay Street in Toronto. Its lawyers previously worked at major Bay Street and national firms and focus on mergers and acquisitions, corporate finance and securities, ban…

Business & Corporate LawBusiness & Corporate Law

SchultzFrost LLP

5 lawyers

SchultzFrost LLP is a Toronto insurance litigation boutique that defends accident benefit, bodily injury, and fraud claims for insurers. The firm handles arbitrations, trials, and appeals before the Licence Appeal Tri…

Insurance LawInsurance LawCivil Litigation & Dispute ResolutionCivil Litigation & Dispute Resolution

Wolfe Lawyers

2 lawyers

Wolfe Lawyers is a personal injury firm with offices in Toronto, Peterborough, and Oshawa, serving clients from Windsor to Kingston. The firm's lawyers previously represented insurance companies before shifting to adv…

Personal InjuryPersonal InjuryInsurance LawInsurance Law

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