Career
Mathews served as Commander of Her Majesty Naval Base Devonport. Promoted to Rear Admiral, Mathews was appointed Director-General Nuclear and Controller of the Navy in 2006. He went on to be Director-General Submarines in 2007 and then, following promotion to Vice Admiral, Mathews was appointed Chief of Materiel (Fleet) and Chief of Fleet Support in 2009, a post he stood down from in December 2013.