Disney Professor of Archaeology of the University of Cambridge and Director of the McDonald Institute for Archaeological Research, University of Cambridge , University of Cambridge, UK.
Director of the Institute of Mathematical Sciences, The Chinese University of Hong Kong. Distinguished Professor-at-Large, The Chinese University of Hong Kong. Honorary Professor, Zhejiang University. William Casper Graustein Professor, Harvard University. Professor of Mathematics, Harvard University.
Associate Professor, Classical Studies Program, Willamette University, USA.
Lecturer in Pure Mathematics Department of Mathematics and Statistics, Lancaster University Lancaster, England.