Our Team

Jeffrey Sizemore, Executive Director
Jeff Sizemore is a global leader on atrocity prevention training for practitioners. He is the 2026 Mary Wing-Ming Lee Senior Human Rights Research Fellow for the Asia Pacific Centre for the Responsibility to Protect at the University of Queensland and a visiting professor at George Mason University and Keene State College. He advocates publicly on the value of atrocity prevention as well as working with students entering the human rights and atrocity prevention enterprise. Previously, he served as the Deputy Director in the Office of Security and Human Rights and as the Senior Advisor on Atrocity Prevention for the Bureau of Democracy, Human Rights, and Labor at the United States Department of State. He led and coordinated the bureau’s atrocity prevention efforts, managing atrocity prevention training for the Department, coordinating with interagency colleagues as part of the Atrocity Prevention Task Force, and representing the United States in multilateral atrocity prevention activities.

Prior to joining the State Department, Jeff served for over 20 years in the United States Navy as a Surface Warfare Officer, retiring as a commander in 2020. Jeff received a bachelor’s degree in American Studies from the George Washington University in 2001 and a master’s degree in National Security and Strategic Studies from the United States Naval War College in 2012.  Additionally, he is the Deputy Director of Former, Feds and Friends and as a consultant with Collaborative Structural Change.

Rafiki Ubaldo, Research Director
Rafiki Ubaldo is a doctoral Student at The Jimmy and Rosalynn Carter School for Peace and Conflict Analysis, and a George Mason University Presidential Scholar, 2024.  Before joining The Carter School, he worked in the professional services in The Department of Special Education at Stockholm University and at Lund University School of Economics and Management in Sweden.  He holds a Bachelor of Science in Political Science from Stockholm University and a Master of Arts in Holocaust and Genocide Studies from Uppsala University in Sweden. He is a photojournalist and published scholar and writer. A veteran journalist, he worked in East Africa and Europe. He is a co-editor of two books, and several book chapters. His short story debut, “The Bullet,” was published in Two Third North, and translated and published in Polish, Portuguese, Finnish and Swedish. His photography finds its place between documentary and creative expressions to explore the conditions that shape our lives. A portfolio is available here: www.templesofmemory.org. The album Only Love by Jean Paul Samputu features songs such as Timbuktu Mon Amour and other poems written by Rafiki. He has served as an Executive Board member of The International Association of Genocide Scholars (IAGS), and the Editorial Board of Genocide Studies and Prevention: An International Journal. In Rwanda, he advocated for the study of genocide and prevention, and is honored to have served on the team that created the Masters Programme in Genocide Studies and Prevention at The Center for Conflict Management, University of Rwanda. He is past Vice-President and current board member of Capacitar Rwanda. In 2025, Rafiki Ubaldo was appointed Community Director and Reviews Editor for Peace Chronicle, the Magazine of Peace and Justice Studies Association (PJSA).