縦横家
In 1999, Constantinou was selected as the first permanent Dean of the Whitehead School of Diplomacy. In 2000 the School of Diplomacy was selected to serve as secretariat and project manager for the 2001 United Nations theme, "Dialogue among Civilizations". The year-long effort produced a report, published by the School, entitled "Crossing the Divide" and was presented by United Nations Secretary-General Kofi Annan to the General Assembly. After two three-year terms as Dean, Constantinou returned to private practice.