David Gunnell is Professor of Epidemiology at University of Bristol and a world-leading epidemiologist and public health physician. His research programme is characterised by a detailed interest in understanding life-course influences on adult mental health and suicide. He has extensive international collaborations where his work has contributed to capacity building and suicide-reduction strategies. His research is widely used and cited in national and international prevention strategies and he has been an invited member of two WHO suicide prevention strategy groups. Professor Gunnell’s research has led to the introduction of UK and global prevention initiatives, including restricting access to toxic pesticides, the erection of barriers on popular suicide locations and recommendations about anti-depressant prescribing.