Swedish Museum of Natural History

Research School of Earth Sciences, Australian National University

National Institute of Standards and Technology

Retired, living in Ravenscar

Distinguished Member of Technical Staff, Sandia National Laboratories

Expert Analyst, at Dept. of Earth Science, Utrecht University

Professor of Geosciences, University of Massachusetts-Amherst

Centre for Microscopy Characterisation and Analysis, University of Western Australia

University of Wisconsin

Senior Process Engineer, The University of Texas at Dallas