جامعة زيورخ
In 1972, he became the Rector of Bethel Theological Seminary (Kirchlichen Hochschule Bethel). In the summer semester 1976 he was Professor of Old Testament scholarship and general history of religion at the University of Zurich. From 1988 to 2000 he served as rector of the University of Zurich. During his tenure, in 1998, the University of Zurich became an independent legal entity of the Canton of Zurich.