Siegfried announces two changes to its Executive Committee: Irene Wosgien, currently serving as Chief Operating Officer Drug Substances (COO DS), will take over the global responsibility as Chief Human Resources Officer (CHRO) from Arnoud Middel who will leave Siegfried end of June 2023. Henrik Krupper, currently CEO of HCS Group, will join Siegfried to become the new COO DS. Irene Wosgien will take over as CHRO on 1 July 2023 while Arnoud Middel will assist her during the transition and will continue to support key HR projects until the end of the year.

Henrik Krupper will assume his role on 1 November 2023 at the latest. Until then and starting on 1 July 2023, Marcel Imwinkelried will lead the DS technical operations organization in parallel to his regular role as Chief Operating Officer Drug Products. Both, Irene Wosgien and Henrik Krupper, will serve as members of Siegfried's Executive Committee.

Arnoud Middel joined Siegfried in 2011 and since then has successfully built a professional global HR function which has been instrumental to Siegfried's organizational development and strong growth over the years. After 12 years with the company, he decided to leave Siegfried in order to pursue private ventures and prepare them next chapters of his career. Henrik Krupper (52, German citizen) holds a diploma (Dipl.-Ing.) in mechanical engineering with a specialization in process engineering from the Technical University (RWTH) Aachen (Germany).

After completing his studies, he started his career at Th. Goldschmidt AG as site excellence and production manager followed by positions with increasing operational and managerial responsibilities at Evonik Industries AG (formerly Degussa AG), City Solar AG, Q-Cells SE and Soltecture GmbH. In 2012, he joined HCS Group, an international specialty chemicals company based in Germany, as Managing Director and Chief Commercial Officer and was appointed to his current role of Chief Executive Officer of the company in 2019.