Stephen Mull was confirmed as U.S. Ambassador to the Republic of Poland on September 22, 2012, and sworn in by Secretary Clinton on October 24. He served as Executive Secretary of the State Department from June 21, 2010 until October 5, 2012. Before then, he had served since August 2008 as Senior Advisor to Under Secretary of State for Political Affairs William Burns. Mr. Mull served as Acting Assistant Secretary of State for Political-Military Affairs from January 2007 through August 2008. He served as U.S. Ambassador to the Republic of Lithuania 2003-2006, and was Deputy Chief of Mission at the U.S. Embassy in Jakarta, Indonesia 2000-2003. His other overseas assignments have been in Poland, South Africa and the Bahamas.