 Wernick was deeply involved in the process leading up the Charlottetown Accord of August 1992, supporting the Cabinet Committee chaired by the Right Honourable Joe Clark and chairing the multi-jurisdiction committee that drafted the political accord.He was the Assistant Secretary, Constitutional Affairs at Privy Council Office in the period leading to and including the Quebec referendum on secession in October 1995.From 1996 to 2002 Wernick held Assistant Deputy Minister positions at the Department of Canadian Heritage.