Christian started his professional career in the chemical industry in 2003. He joined the German EPA (UBA) in 2008 where he promoted the development of a national strategy for sustainable P management. In 2011 he moved to the Berlin Centre of Competence for Water as program manager for resource recovery from waste(water). At ISLE Utilities (2017-2019) he continued the know-how transfer into practice. Since early 2019 Christian is managing director of the German branch of EasyMining, a daughter company of the Swedish Ragn-Sells Group, having developed technologies for nutrient recovery from secondary sources. Since 2021 he is also MD of Phosphorgewinnung Schkopau GmbH, a J/V between EasyMining and Gelsenwasser currently implementing the first Ash2Phos full scale plant in Schkopau, South-West of Berlin. Christian is co-founder and board member of the German and European Phosphorus platforms and supporter of the Clean Phosphorus initiative. He is engaged in DWA, International Fertiliser Society (ifs) and engaged in various European and German committees.