 From 1989 to 1993, he served as counsel in the Constitutional Law and Policy Division, conducting constitutional litigation on the Government’s behalf.From 1993 to the end of 2015, he served as counsel in the Crown Law Office Criminal, conducting criminal appeals in the Ontario Court of Appeal and the Supreme Court of Canada.He has appeared on at least 30 cases in the Supreme Court of Canada in his career, as counsel or co-counsel, and in some 200 cases in the Ontario Court of Appeal.