In 2018, Arne committed himself to turn around the ISWA, which at that time was based in Vienna, Austria. Within two years Arne managed to keep together the core team of employees, to solve the difficult economic situation and, together with the board of directors, to develop a future strategy for 2030 that is currently implemented. In addition, Arne organized und supervised the relocation of the General Secretary from Vienna to Rotterdam in 2019/2020, while at the same time building up new legal structures in the Netherlands and liquidating the existing ones in Austria. At the end of 2019, Arne completed his successful accomplishment and handed over the managing responsibility for ISWA to Marc Tijhuis, the current Managing Director of ISWA. Arne now serves as Vice President and Board Member of ISWA.