Dennis R. O'Connor is the current Associate Chief Justice of Ontario and sits on the Ontario Court of Appeal. Justice O'Connor attended Osgoode Hall Law School of York University in Toronto. He practised law from 1973 until 1976. From 1976 to 1980 he became a teacher at the University of Western Ontario Faculty of Law and from there went to practise litigation at Borden, Elliot in Toronto. He was a negotiator for the Government of Canada in the Yukon land claim debate. He was eventually appointed to the Ontario Court of Appeal in 1998 and was elevated to Associate Chief Justice of Ontario in 2001. He was appointed Commissioner in the Walkerton Inquiry in 2000, and was Commissioner in the Arar Inquiry from 2004 to 2006.
