Doctor of Medicine, University Oulu, Finland, 1974. Doctor of Philosophy, University Oulu, Finland, 1980.
Resident in pediatrics University Central Hospital, Oulu, 1976-1980. Resident in child neurology, neuropediats. and rehabilitation University Gothenburg, 1982-1984. Physician-in-chief Boden Central Hospital, Sweden, 1980-1982.
Lecturer University Oulu, 1982-1986. Professor University Gothenburg, Sweden, 1986-1990. Physician-in-chief Children's Castle Hospital, Helsinki, Finland, 1990-1994.
Head department research Regional Neuropediatric Rehabilitation Center, Gothenburg, 1994-1996. Head department child neurology Helsinki University Central Hospital, 1997—2001. Professor child neurology University Helsinki, since 2002.
Professor neuro-pediatric rehabilitation Karolinska Institute, Stockholm, since 2002.
Corporal Finnish Army, 1975. Member Folke Bernadotte Foundation (board directors since 1986), Petter Silfuerskold Foundation.
Son of Henrik Willehad von Wendt. Married Gunvor Christina Karsten, February 21, 1970 (divorced September 2000). Children: Hanna, Jonas.
Married Taina Nieminen, 2001. 1 child Alexandra.