His research is in the fields of developmental biology and maternal-fetal medicine, and he is the author of more than 400 publications.

He has served in leadership roles in a number of international and national organisations, including as President of the International Fetal Medicine and Surgery Society, Chair of the Scientific Advisory Committee of the Royal College of Obstetricians and Gynaecologists, Chair of the Steering Committee of the Association of Academic Health Centers International and Chair of the Go8 Deans of Medicine Committee. He is currently a Board Member of Research Australia and Chair of the Go8 DVCR Committee. For UNSW he Chairs the Board of NewSouth Innovations, and is UNSW representative of TEDi-London.