On September 17, 2005, he married fellow MLA Joan MacAlpine making them the first husband and wife to serve together in the New Brunswick legislature.
A 1973 graduate of the University of New Brunswick with a Bachelor of Business Administration degree, he worked for various companies as a controller and also managed his own private woodlot where he produced maple sugar.
This committee was charged with investigating the surging insurance rates in the province and making recommendations to curb and reduce them; something that would become a major issue in the 2003 election.
Stiles was re-elected in 2003 and would serve as vice-chairman of the select committee to study public auto insurance which was chaired by New Brunswick New Democratic Party leader Elizabeth Weir.
On April 17, 2007, he announced that he would cross the floor to join the Liberal party, along with his wife and fellow MLA Joan MacAlpine.