Kristen Silverberg served as U.S. ambassador to the European Union from 2008 to 2009 and as assistant secretary of state for international organization affairs from 2005 to 2008.  Prior to her time at the State Department, she held a number of senior positions at the White House, including deputy assistant to the president and advisor to the chief of staff.  She served in 2003 in Baghdad, Iraq for which she received the Secretary of Defense Medal for Outstanding Public Service.  Silverberg formerly practiced law at Williams and Connolly, LLP, and served as a law clerk to Supreme Court Justice Clarence Thomas and Judge David Sentelle of the U.S. Court of Appeals.  Silverberg serves on the Board of Directors of Vorbeck Materials and the Advisory Board of Beacon Global Strategies.