David O'Brien was appointed to the OMERS Board in September 2006 and reappointed to the OAC Board in 2009. Mr. O’Brien is Chair of the Human Resources Committee and is a member of the AC/SC Joint Council Sub-Committee and Investment Committee.
Mr. O'Brien is retired as President and CEO, Toronto Hydro Corporation where he served between 2004 and 2009. Prior to joining Toronto Hydro Corporation, Mr. O'Brien was on a six-month secondment with Ontario's Ministry of Energy from the City of Mississauga, where he initially joined as Associate Deputy Minister of Energy and was later appointed Deputy Minister.
Mr. O'Brien began his career in the City of Sudbury where he rose to the position of City Manager. Since then he has held the position of City Manager for the Region of Ottawa-Carleton, the City of Gloucester, the City of Ottawa and, most recently, the City of Mississauga. He has also served as President and Chief Executive Officer of Enersource Corporation, the parent company of Hydro Mississauga. After stepping down as Chief Executive Officer, he was appointed to the Board of Directors of Enersource Corporation and Chair of the Development Committee. He is also member of the Plutonic Power Corporation Board, Apex CoVantage Board, Summerhill Group Advisory Board and the Hatch Advisory Board.
Mr. O'Brien has a Bachelor of Arts from the University of Windsor and has studied public administration at the graduate level.