Carol Anne O'Brien, Barrister & Solicitor
Automatically compiled listing. Details may contain errors.1 lawyer · City of Toronto
One of 2,276 law firms listed in Toronto, and one of 156 handling Administrative & Regulatory Law.
1 lawyer · City of Toronto
One of 2,276 law firms listed in Toronto, and one of 156 handling Administrative & Regulatory Law.
Carol Anne O'Brien, Barrister & Solicitor is a solo Toronto practice founded in 2010, after Carol Anne O'Brien spent 12 years, six of them as a partner, at the business law firm Cassels Brock & Blackwell LLP. Called to the Ontario bar in 1998, O'Brien built the practice around Canadian regulatory law: helping businesses comply with the Competition Act, federal and provincial privacy legislation, and Canada's Anti-Spam Legislation, and navigate specialized regimes covering broadcasting and telecommunications, cultural industries, and food, drug, cosmetic, and medical device products. The practice works independently, and brings in other lawyers and professional service providers when a matter calls for it.
Before law, O'Brien worked in libraries and information services: as a librarian at Memorial University of Newfoundland in St. John's, a business information specialist at Polysar in Sarnia, and a library manager at Health Canada in Ottawa. That background carried into volunteer work. O'Brien served on the Board of Directors of the Southern Ontario Library Service from 2009 to 2016, an organization that supplies resources and services to Ontario's public libraries, and was Vice-Chair of the board from 2012 to 2016. O'Brien holds a B.A. Hons. from Queen's University, a Master of Library Science from the University of Toronto, and an LL.B. from the University of Ottawa.
By appointment151 Yonge Street, Suite 1500, Toronto, Ontario M5C 2W7 · 416-640-7270
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Bankruptcy & InsolvencyThis listing was generated by AI from public sources in August 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗
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