David Handelsman is a world-leading authority on androgen physiology, pharmacology and toxicology arising from his sustained and wide-ranging clinical, experimental and public health research and discoveries in elucidating androgen action, use and misuse. He became Australia’s first Professor of Andrology (1996), created Australia’s first hospital Andrology Department (1999) and is inaugural Director, ANZAC Research Institute (1999). The most highly cited author and author of the major textbook chapters in his field, he has >450 papers, cited >16,000 times (h index 71) including an editorial for New England Journal of Medicine (2013) with his work highlighted by a Time magazine cover story on testosterone (2014).