Dr Leonard graduated in Medicine at Trinity College Dublin in 1991, and then in 1995 was awarded a British Council Research Fellowship in Asthma Immunology working on in vitro responses to allergen in asthmatic mononuclear cells, winning an American College of Chest Physicians young investigator award during this time. Dr Leonard then did a pulmonary & critical care medicine fellowship at Stanford University Medical Center in California between 1997 and 2000, before joining the Stanford faculty as an Attending Physician on the lung transplant Programme. In late 2000 Dr Leonard moved to Manchester, UK, as Consultant Thoracic Physician and lead physician for the lung transplant programme and the interstitial lung disease (ILD) service. Since 2008 Dr Leonard has been part-seconded to NICE as a Consultant Clinical Adviser to the topic selection team for technology appraisals and Medtech innovation briefings. Dr Leonard spends 50% of his time in clinical work looking after patients with severe lung disease, and chairs his hospital’s medicines optimisation committee and sits on the Greater Manchester Medicines Strategy Board, and is an Honorary Clinical Senior Lecturer at University of Manchester.