Sebastian was born in 1977. He is a graduate of the University of Mannheim and Sciences Po Paris, where he studied economics and political science. After five years as a project manager at the Council of Europe in Strasbourg, he joined the European Forum for Urban Security (EFUS) as a programme manager. He joined Civipol in 2016 as a project manager and in 2018 became head of the People Movement and Migration unit, where he is also responsible for Reform of the Security Sector.