Bernard Röling was born in 1906 in 's-Hertogenbosch. In 1922 he received a doctorate after studying law in Nijmegen, Marburg and Utrecht. He completed a thesis on: 'Legislaton regarding so-called business and habitual criminals'. He received a prize from the University of Groningen for it.
Röling was made lecturer in penal and penitentiary law in the University of Utrecht. The first milestone in Röling's career was the founding of the Institute of Criminology in Utrecht. the first of its kind in the Netherlands.
He was made a judge in the Tokyo during the war trials of 1946. Later on he became a member of the Dutch delegation to the United Nations, where he was involved in international disputes. In this function he became well-known for holding opinions which deviated from opinions of the majority.