Priscilla Hayner is a member of the United Nations Standby Team of Senior Mediation Advisers, focused on transitional justice and process design. She has worked in the field of transitional justice for many years, co-founding the International Center for Transitional Justice in 2001 and publishing widely on truth commissions and other justice issues. She published her first book, Unspeakable Truths: Transitional Justice and the Challenge of Truth Commissions, in 2001, with a second edition in 2011. She is now focused on justice and accountability in contexts of peace negotiations. She previously served as transitional justice adviser to the Centre for Humanitarian Dialogue, the Norwegian Ministry of Foreign Affairs, and the Kenyan National Dialogue, and has provided support for peace negotiations in the Central African Republic, Colombia, Cyprus, Kenya, Yemen, and elsewhere. Her second book, The Peacemaker’s Paradox: Pursuing Justice in the Shadow of Conflict, was released in early 2018.