David is a Pulmonologist, Director of the National Pulmonary Hypertension Centre (Sheffield) and Professor of Pulmonary Vascular Medicine at the University of Sheffield. He is the Chief Investigator of the ASPIRE Registry, Chair of the UK National Audit of Pulmonary Hypertension and a member of the 2022 ESC/ERS Pulmonary Hypertension Guidelines and 2024 7th World Symposium Imaging Task Forces. His research interests include the diagnosis and assessment of pulmonary hypertension with a focus on imaging. He has participated in research funded by the NIHR, the BHF, Wellcome Trust and the Medical Research Council.