• April 2021: Founding of Dr Ruppin & Colleagues Implant Centre, Penzberg
• 2018: Convocation to the mentoring programme of the German Society for Implantology (DGI)
• 2015: Recognition as a certified specialist in implantology by the European Dental Association
• 2009 – March 2021: Head of the Masur Implant Centre, Penzberg
• 2007 – 2009: Work as an oral surgeon at the Praxisklinik für Implantologie, Mund-, Kiefer-, Gesichtschirurgie und plastische Chirurgie, Munich
• 2001 – 2007: Training as a specialist dentist in oral surgery with treatment focus on implantology and prosthetics, private outpatient clinic of Prof. Riediger; teaching and research activities with focus on 3D diagnostics and computer-navigated implantology, University Hospital of RWTH Aachen
• 1999 – 2001: Work as an assistant dentist, Freiburg
• 1998: State examination and doctorate at the Albert Ludwig University in Freiburg im Breisgau