Senior consultant Karolinska University Hospital, Stockholm, 1982, chairman department neurosurgery, 1989—1996. Chairman World Health Organization collaborative Karolinska Institute, since 1992. Chairman center technical in health Royal Institute of Technology, 2003, professor neuronic engineering, since 1995.
Professor neorologic engineering Karolinska Institute, since 2003. Professor National University Singapore, 2005, consultant. With Army of Sweden, 1975-1978.