Professor Gary Wittert is a graduate of Johannesburg’s University of Witwatersrand and underwent his postgraduate training at Christchurch Hospital and Otago University, in New Zealand, at the Harvard Medical, Boston and Oregon Health Sciences University.

He is the Mortlock Professor of Medicine, Head of the Discipline of Medicine at the University of Adelaide, Senior Consultant Endocrinologist at the Royal Adelaide Hospital, and Director of the Freemasons Foundation Centre for Men's Health. He is a Fellow of the Australian Academy of Health and Medical Sciences and Senior Principal Research Fellow at the South Australian Health and Medical Research Institute. He is a past President of the Australasian Society for the Study of Obesity, and is currently vice president of the Asia Oceania Association of the Study of Obesity.