Reiner Braun was a board member of IPB from 2006 to 2013, then Co-President until 2019 and subsequently Executive Director from 2019 to 2022. Following a break from 2022 to 2025, he was elected a board member in 2025 for the upcoming term (2025-2028).
Reiner studied German literature, history and journalism. He was actively involved in the ‘Krefeld Appeal’ and the actions of the peace movement in the 1980s. Reiner is on the board of the ‘NaturwissenschaftlerInnen-Initiative – Verantwortung für Frieden und Zukunftsfähigkeit’, he is a founder and long-standing managing director of INES (International Network of Engineers and Scientists for Global Responsibility) and was managing director of IALANA (International Lawyers against Nuclear Weapons) and the VDW (Federation of German Scientists, German Pugwash group).