Professor Wittert is a senior Endocrinologist and scientist of national and international standing, earned through 25 years of dedication to excellence and innovation in basic science, clinical and population-based research. His achievements are multidisciplinary and include new understandings of the physiology of food intake, metabolism and body composition, the consequences of obesity beyond heart disease and diabetes, hormones and ageing and engagement by men in health care. These have translated into new clinical guidelines, interventions and resources for obesity, urological, reproductive disorders and service delivery, and medical training, as well as his specialist and health policy committee appointments across organisations.