John Thomas Schieffer (born October 4, 1947) is an American diplomat and entrepreneur who served as U.S. Ambassador to Australia from 2001 to 2005 and as U.S. Ambassador to Japan from 2005 to 2009. Schieffer is the founder and President of Envoy International, a consulting firm that provides a wide range of services to clients with international interest. Schieffer is also a keynote speaker on international issues, trade, the global economy, leadership, and organizational management.