Research Professor of Chemistry, University of St Andrews.

Professor of Exploration Geoscience, Heriot-Watt University.

Emeritus Professor of Petrology, University of Edinburgh.

Professor of Chemistry, Hunter College, City University of New York.

Head of School of GeoSciences and Professor of Climate Studies, University of Edinburgh.

Professor of Physical Chemistry, Keele University.

Managing Director, Drochaid Research Services Ltd.

Professor and Head of Department, Humboldt University of Berlin.

Professor of Environmental Geophysics, University of Edinburgh.

Honorary Fellow, University of Edinburgh.

Professor of Environmental Science, University of Stirling.

Fullerian Professor of Chemistry, University of Cambridge.