David Peter O'Brien OC (born 9 September 1941) is a Canadian lawyer and company director.
An Irish Quebecer, O'Brien was born and educated in Montreal, and began his career in 1967 with the law firm Ogilvy Renault.
O'Brien has held directorships with several other major Canadian corporations, including Molson, Air Canada, TransCanada Pipelines, and Vale.
[2] In addition to his current role as chairman of Royal Bank of Canada, O'Brien is a board member at Enerplus, Range Royalty, and Spur Resources and has previously served as a director at Molson Coors Brewing Company, TransCanada Corporation, Fairmont Hotels and Resorts, Inco Limited and the C. D. Howe Institute.
[4] In 2005, he endowed the O'Brien Fellowships in the Centre for Human Rights and Legal Pluralism at McGill University's Faculty of Law.