Regents Professor, Earth & Environmental Sciences, U. Minnesota

Professor of Geochemistry, University of Science and Technology of China

Professor Emeritus, Australian National University

Woodwardian Professor of Geology, University of Cambridge

Professor of Geology, University of Johannesburg

Bristol, Exeter, Newcastle, Birmingham, UNSW

Professor of Geochemistry, University of Maryland

Department of Geology, University of Maryland

Professor of Isotope Geochemistry, Royal Holloway University of London

University Bern