Jakob Gijsbert "Jaap" de Hoop Scheffer ([ˈjaːb də ˈɦoːp ˈsxɛfər]  ( listen); born 3 April 1948) is a retired Dutch politician and diplomat. He is a member of the Christian Democratic Appeal (CDA). He served as the 11th Secretary General of NATO from 5 January 2004 until 1 August 2009.