Stefan Petters was a prominent researcher at CISTER from 2009 until 2014. He was research line leader and also had the role of Vice-Director of CISTER. Stefan was an outstanding person, and his energy, wisdom, intelligence and team spirit were instrumental for the growth of CISTER-Labs. Stefan was a prominent member of the international community and his contributions will last long in the memories. Stefan sadly passed way last week, at the age of 50.