Doctor of Medicine, Catholic University Nijmegen, 1979. Doctor of Philosophy, Radboud University Nijmegen, 2000.
Professor & chairman Radboud University Nijmegen Medical Centre, since 1987. Visiting professor Case Western Reserve University, Cleveland, Medical & Pharmaceutical University, Toyama, Japan, George Washington University, Washington, Johns Hopkins University, Baltimore, Christian Medical College, Vellore, India, Sree Chitra Tirunal Institute Medical Sciences, Thiruvanathapuram, Kyrino University, Tokyo, Federal University, Sao Paulo, Brazil, University Alameda Professor Hernâni Monteiro, Porto, Portugal, The American Hellenic Educational Progressive Association University, Thessaloniki, Greece, University La Plata, Argentina, State University New York, Buffalo, University Putra Malaysia Serdang- Selangor, Putrajaya, Malaysia, University Guadalajara, Mexico. Consultant Covidien, Inc., Kuros, Inc., Switzerland.
Member advisory board B.Braun, Aesculap, Germany. Chairman Committee Medical Expertise NVvN, Postgraduate Education Committee European Association Neurosurg. Society, Consilium Neurochirurgicum NVvN.
Member Accreditation Committee NVvN. Member editorial board Minimally Invasive Neurosurgery, Ukrainian Journal Minimally Invasive Surgery, Revista Neurocirurgia. Ad hoc reviewer Journal Neurosurgery, Central European Neurosurg., Neurosurg.
Review, Neurological Science. Lieutenant Dutch Army Forces, 1979-1981, reserve-captain Dutch Army Forces, 1981-1986, reserve-major Dutch Army Forces, 1986-1991, reserve-Lieutenant-colonel, since 1991.
Advisor Dutch Pituitary Foundation. Member Medical Disciplinary Board. Member of International Society Neurosurg.
Technology & Instrument Invention, International Federal Neuroendoscopy, British Neuro-Oncology Group, European Skull Base Society, Congress Neurological Surgeons, American Association Neurological Surgeons, German Society Neurosurgery, Dutch Society Skull Base Surgery, Dutch Neurosurg.
Married Brigitte Dressler Grotenhuis, November 25, 1988 (divorced 2002). Married Agnesa Dzamkova Grotenhuis, April 29, 2003.