Complex sentence: Former Under Secretary of State for Political Affairs (2005-2008), also U.S. ambassador to NATO for President George W. Bush and to Greece for President Clinton, as well as serving as state department spokesman for Secretaries Warren Christopher and Madeleine Albright.
Split into simpler sentences: Former Under Secretary of State for Political Affairs (2005-2008). He was also U.S. ambassador to NATO for President George W. Bush and to Greece for President Clinton, as well as serving as state department spokesman for Secretaries Warren Christopher and Madeleine Albright.