Professor O’Donnell received his medical degree from Trinity College Dublin. After internship and medical residency in Australia, he completed clinical haematology training in the Hammersmith and Royal Free Hospitals in London.

In 1998, he obtained a Medical Research Council Training Fellowship and was awarded his PhD by Imperial College London in 2001. He subsequently completed a post-doctoral fellowship in the Hammersmith Hospital and was appointed as senior lecturer in Imperial College in 2004.

He is a fellow of both the Royal College of Physicians of Ireland, and the Royal College of Pathologists (UK). Following his return to Ireland in 2005, he became the first clinician scientist to receive the prestigious Science Foundation Ireland President of Ireland Young Investigator award.

MB, BCh, PhD, FRCPI, FRCPath

The Haemostasis Research laboratory, led by Professor O'Donnell, has been awarded more than £12 million in peer-reviewed grant funding since 2006. His research programme in Ireland has been funded by Science Foundation Ireland, the Health Research Board (HRB), the Irish Heart Foundation, the Wellcome Trust and the National Children's Research Centre (NCRC).

Professor O'Donnell's laboratory has focussed on basic research related to different aspects of vascular biology in relation to clinical bleeding and thrombosis. He has published more than 150 publications in high-impact peer-reviewed journals. Based on this research, he has also been invited to give numerous lectures at the most prestigious national and international haematology meetings, including the American Society of Hematology annual meeting, the Hemostasis Gordon Researh Conference and the congress of the International Society on Thrombosis and Haemostasis.