Managing a 21st Century security agenda: U.S. foreign policy beyond Iraq and Afghanistan Ambassador Christopher Hill Sep 27, 2011, 4:00-5:30 pm EDT Weill Hall During his 33-year Foreign Service career Christopher Hill served as an ambassador to Macedonia, Poland, South Korea and, most recently, Iraq. Ambassador Hill was part of the team that negotiated the Bosnian Peace Settlement in 1995, headed the U.S.