William Brockenbrough Taylor Jr. (born September 14, 1947) is an American diplomat, government official, and former military officer. He served as the 6th United States ambassador to Ukraine from 2006 to 2009 under President Bush and Obama, and as chargé d’affaires to Ukraine from June 2019 to January 2020 under President Trump. Taylor is a former captain and company commander in the United States Army; he served in the Vietnam War and earned a Bronze Star and an Air Medal with a V device for valor. He proceeded to work in the United States Department of Energy and then the Department of Defense. From 1992 to 2002, Taylor served as a U.S. diplomat in Eastern Europe and the former Soviet Union, Afghanistan, Iraq, and at the Quartet on the Middle East. From 2006 to 2009, Taylor served as the United States ambassador to Ukraine under the Bush and Obama administrations. He continued his diplomatic work in the Middle East from 2011 to 2013. Following the recall of U.S. Ambassador to Ukraine Marie Yovanovitch in mid-2019, Taylor was appointed chargé d'affaires for Ukraine under the Trump administration. Upon the expiration of his temporary appointment, he left in early January 2020