Ambassador Princeton N. Lyman is a senior advisor to the President for the U.S. Institute of Peace.
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Ambassador Princeton N. Lyman served as United States special envoy for Sudan and South Sudan from March 2011 to March 2013. As special envoy he led U.S. policy in helping in the implementation of the 2005 Comprehensive Peace Agreement. Ambassador Lyman previously held the position of Ralph Bunche Fellow for African Affairs at the Council on Foreign Relations (CFR). He was also an adjunct professor at Georgetown University and at Johns Hopkins School for Advanced International Studies.