Assistant professor cardiology Karolinska Institute, 1949, professor medicine, 1958-1982, emeritus, since 1982. Assistant professor internal medicine University Lund (Sweden), 1950-1958. Head department medicine Serafimer Hospital, Stockholm, 1958-1980, physician in chief, 1961-1977.
Senior physician Karolinska Hospital, 1980-1981. Physician to Royal Family, 1965-1985, 1st physician to King Gustaf VI Adolf of Sweden, 1968-1973, to Crown Prince Carl Gustaf of Sweden, 1970-1973, to King Carl XVI Gustaf, 1973-1985, to Queen Silvia and Princess Lilian, 1976-1985, to Prince Bertil, 1984-1985. Member Parliament, 1976-1987.
Science adviser Royal Medical Board, 1960-1981, Military Medical Board, 1960-1986. Member World Health Organization Expert Advisory Panel, 1960-1986. Chairman Nobel Assembly, Karolinska Institute, 1981.
Author: Our People and Its Future, 1940. Myoglobin in Man, 1949. If Your Heart Troubles You, 1953.
Medicine for Politicians, 1953. Man's Possibilities, 1956. Conditions of Medical Care, 1966.
Soul and Heart, 1967. Record 67, 1967
To the Defense of the Serafimer Hospital, 1974. Unity and Diversity, 1974. With Stethoscope and Sword, 1974.
Speeches at closing of the Serafimer Hospital, 1980, 10 years speeches in Parliament, 1986. Research, numerous publications on biochemistry, physiology, clinical manifestations, epidemiology and rehabilitation of heart disease.