Payton Knopf is the coordinator of USIP’s South Sudan senior working group, which is focused on developing innovative strategies and policy options for promoting a negotiated settlement to the civil war in South Sudan and on examining the regional dynamics of the war within the Horn of Africa. He is concurrently the U.S. liaison of the European Institute of Peace (EIP). Knopf is a former U.S. diplomat with expertise in sub-Saharan Africa, North Africa, and the Middle East. Immediately prior to joining USIP, Knopf was the first coordinator the UN Panel of Experts on South Sudan, from its inception in 2015 until April 2017. He was also formerly a senior advisor at the Crisis Management Initiative (CMI)/Martti Ahtisaari Centre and the PeaceWorks Foundation. Before leaving government, he was spokesman at the U.S. Mission to the United Nations under then-Ambassador Susan E. Rice, having previously served as a policy advisor to U.S. Special Envoy for Middle East Peace George Mitchell. From 2006 to 2008, he was based at the U.S. Embassy in Khartoum, where he advised the then-U.S Special Envoys for Sudan Andrew Natsios and Richard Williamson on issues related to the conflict in Darfur and to the implementation of the Comprehensive Peace Agreement for Sudan. His other State Department assignments included in the Office of Egypt and the Levant and at the U.S. Consulate General in Jeddah, Saudi Arabia. He was an International Affairs fellow in residence at the Council on Foreign Relations from 2010-2011 where is researched focused on diplomatic engagement with non-state armed groups.