Neurosurgery: brain-, skull base-, spine, and pediatric neurosurgery

01.01.2020 to date: Professor, Chair of Functional Neurosurgery, Stereotaxy and Neuromodulation, (University of Bonn, Germany), Associate Research Professor (University of Otago in Dunedin, New Zealand) 2018-2019: Associate Professor of Neurosurgery University of Otago in Dunedin and consultant neurosurgeon in SDHB 06/2017: Professor of Neurosurgery, University of Düsseldorf, Germany 07.2016: Secundo loco Professor of Stereotactic Oncology and Radiosurgery University of Cologne, Germany 2013-2018: Consultant neurosurgeon (Associate Professor, Oberarzt) at the Dept. of Neurosurgery, Heinrich-Heine University in Düsseldorf, Germany 2004- 2013: Assistant doctor - resident in Neurosurgery at the Department of Stereotactic and Functional Neurosurgery and General Neurosurgery at the University of Freiburg, Germany