From 1986 to today, USIP’s Jennings Randolph Senior Fellowship program has supported research, writing and in-house advising on a wide variety of topics related to peace and violent conflict. The program's more than 320 past fellows have studied everything from the influence of Track Two Diplomacy on U.S.-Russia relations to the effects of oil and other natural resources on prospects for peace.

Current Senior Fellows include:

Louis-Alexandre Berg

Louis-Alexandre Berg is an Assistant Professor of Political Science at Georgia State University and a 2020 Jennings Randolph Senior Fellow at the U.S. Institute of Peace. His research examines civil wars and postwar state building, security and justice sector reform, and the effects of foreign aid and military assistance, with a focus on how politics in conflict-affected countries affect the outcomes of international peacebuilding efforts. He also conducts research on the relationship between politics and organized crime in weak states.

Prior to his university appointment, he worked at the World Bank, where he developed new approaches to justice and security programming in conflict-affected countries, and at the U.S. Agency for International Development (USAID) and the U.S. Department of State, where he designed, managed, and evaluated security, justice, and rule of law programs around the world.

He has been a Research Fellow at the Belfer Center for Science and International Affairs at the Harvard Kennedy School, a USIP Peace Scholar Fellow, and a Presidential Management Fellow. He has also served as an expert consultant for the U.S. government, the World Bank, and the United Nations on security and justice programming, and his work has been published in academic and policy outlets, including in the Journal of Conflict Resolution, Journal of Peace Research, International Interactions, Civil Wars, and International Peacekeeping.

Dr. Berg holds a PhD in Government from Georgetown University, a Masters from the Woodrow Wilson School at Princeton University, and a BA from Brown University.

Sarah Holewinski

Sarah Holewinski is a 2020 Jennings Randolph Senior Fellow at the U.S. Institute of Peace, advising the Institute on security sector reform strategy. She was most recently senior advisor on human rights to the Office of the Chairman of The Joint Chiefs. Prior, she was deputy chief of staff for policy for Ambassador Power at the U.S. Mission to the United Nations.

For nearly a decade, Sarah was executive director of Center for Civilians in Conflict (CIVIC), leading efforts to advise warring parties on civilian protection and responsible use of force. In that role, she worked extensively with the U.S. military and its allies and in Afghanistan, Iraq, Somalia, CAR, Burma, and elsewhere.

In 2014, Sarah was named in Top 100 Most Influential People in Armed Violence Reduction by Action on Armed Violence and received the Truman National Security Project’s award for Extraordinary Impact in 2015. She was a member of the (Bill) Clinton Administration’s White House AIDS Policy team, a senior associate at West Wing Writers, and consulted for Human Rights Watch, Ford Foundation, and the William J. Clinton Foundation. Sarah holds degrees from Georgetown and Columbia Universities, is a member of the Council on Foreign Relations, and teaches at Arizona State University and Georgetown University.

Ambassador Hesham Youssef

Ambassador Hesham Youssef is a career diplomat and former Assistant Secretary General for Humanitarian Affairs at the Organization of Islamic Cooperation (2014-2019). From 2001-2014, he served in the Arab League as Official Spokesman, and, later, the Chief of Staff to Secretary General Amr Moussa, from 2003- 2011. From 2012-2014, Ambassador Youssef was a Senior Advisor to the Secretary General of the Arab League, Dr. Nabil Elaraby. Amb. Youssef advised on issues pertaining to crisis management as well as the reform of the Arab League.

He was a member of the Egyptian negotiating team in the Multilateral Middle East Peace Negotiations as part of the Madrid Process, and has remained heavily engaged on this issue, including in Track II regional security forums. Ambassador Youssef joined the Ministry of Foreign Affairs of Egypt in 1985 and was posted to the Egyptian Embassy in Canada (1988-1992) and the Egyptian Mission in Geneva where he focused mainly on economic and trade issues in the United Nations and the World Trade Organization (1995-1999). He was a member of the Cabinet of the Egyptian Minister for Foreign Affairs from 1992-1995 and 1999-2001.

Ambassador Youssef is a central part of the USIP Israeli-Palestinian Conflict Program’s effort to study the changing geopolitical context surrounding Israeli-Palestinian peacemaking. Ambassador Youssef will be instrumental in a USIP and Rice University Baker Institute for Public Policy partnership study group on the issue. The project will consider bilateral and multilateral progress on the peace process and aims to generate multi-stakeholder-directed recommendations for preventing deterioration and promoting progress toward resolving the Israeli-Palestinian and broader Arab-Israeli conflicts.