President of the International Neuroscience Institute (INI) at Otto-von-Guericke-University
President of China INI
Chairman (Retired) of Neurosurgical Departments
Hannover School of Medicine and Klinikum Hannover Nordstadt
Honorary President of the World Federation of Neurosurgical Societies (WFNS)
Honorary President of the Continental African Association of Neurosurgical Societies (CAANS)
1957 – 1963 Medical School University of Mainz, Germany, including second study of biology
1970 Associate Professor and Vice Director of Neurosurgical Department, University of Mainz
1971 Professor of Neurosurgery
1977 – 2002 Director of Neurosurgical Department Nordstadt Hospital Hannover
1988 Chair of neurosurgery at the Hannover Medical School
1991 Founder Member and 1st President of the German Society of Skull Base Surgery
1991 Founder and 1st President of Neurobionics Foundation Hannover
1992 President of International Skull Base Society
1995 Honorary President of German Society of Skull Base Surgery
1996 – 1998 President of the German Society of Neurosurgery
1996 – 2002 Director of the Neurosurgical Departments at Hannover School of Medicine and Klinikum Hannover Nordstadt
1997 – 2001 President of the World Federation of Neurosurgical Societies (WFNS)
1998 – 2005 Founder and first President of WFNS Foundation
July 2000 President of the International Neuroscience Institute (INI). Inauguration on 21 July, 2000
June 2001 Honorary President of CURAC (German Society for Computer- and Robot-assisted Surgery
Sept 2001 Honorary President of WFNS
July 2004 Nomination as President of the China International Neuroscience Institute at the Capital University of Medical Sciences in Peking, China
Since 2005 Honorary President of WFNS Foundation
2011 Founder and President of the Iran International Neuroscience Institute
2011 WFNS awarded Madjid Samii Medal of Honour
2011 WFNS Ambassador for Africa
2016 Honorary President of the Continental African Association of Neurosurgical Societies (CAANS)
Honorary doctors and professors of 21 universities worldwide.
Honorary and/or corresponding member of 71 national and international scientific societies.
Visiting Professor of Neurosurgery at numerous universities in Europe, USA, Latin Amerika and Japan.
Honorary citizen in 11 cities.
Editor of 17 neurosurgical books and more than 500 publications.