Hilary Humphreys is Professor of Clinical Microbiology at the Royal College of Surgeons in Ireland and Consultant Microbiologist in Beaumont Hospital, Dublin. He has a longstanding research interest in hospital infections, especially on Staphylococcus aureus, and he has over 300 publications. He has led a number of guideline groups in Ireland and in the UK covering antimicrobial resistance. He is Dean of the Faculty of Pathology at the Royal College of Physicians of Ireland since early 2016. He was chairman of the Department of Health’s National Clinical Effectiveness Committee from 2010 to 2017. This Committee reviews, assesses and recommends for national endorsement, clinical guidelines and audit.