 He is fellow of the Australian Academy of Science (1988) and in 2008 was awarded its Craig Medal for contributions of a high order to any branch of chemistry by active researchers.He is a member of the International Academy of Quantum Molecular Science (1989).Until 2011, he was President of the World Association of Theoretical and Computational Chemists (WATOC) and organised the WATOC 2008 Conference in Sydney, Australia.