When at the Australian National University, he was awarded the status of Fellow in the American Physical Society, after being nominated by their Forum on International Physics in 2001, for codevelopment of the 1/N boson expansion technique for describing the properties of medium- to heavy- mass nuclei and for its extensions to high-spin states and subbarrier fusion as well as for his significant contributions to the promotion of international physics. He is also a Fellow of the Australian Institute of Physics.