Prof. Jon Gunnlaugur Jonasson is the National University Hospital of Iceland’s 2024 Honorary Scientist for outstanding contributions to science during his career. He is the Chief Medical Officer of the Department of Pathology at the National University Hospital of Iceland and Professor of Pathology at the University of Iceland. Jon Gunnlaugur completed his doctoral degree at the University of Iceland in the spring of 1982. After a year of study and a district assignment, Jon Gunnlaugur worked at the University of Iceland’s Pathology Laboratory before going on to further his studies in Pathology in London in 1985. At first, he worked at the Royal Marsden Hospital in Kensington, then at St. Mary’s Hospital on Praed Street, Paddington. In 1989, Gunnlaugur received a fellowship to study at Beth Israel Hospital in Boston, USA, and completed a doctorate at Harvard University. Jón Gunnlaugur was awarded a specialist accreditation in pathology in Iceland in 1989. Since the mid-1990s, he has been a practicing specialist at the Department of Pathology at Landspítali (formerly the University of Iceland’s Department of Pathology), and he has been the head physician of the department since 2013. From 2001 to 2016, he was also the part-time head physician of the Icelandic Cancer Registry at the Cancer Society. Jón is one of the founders of the Icelandic Institute of Pathology, which has been working on the diagnosis of pathological diseases since the autumn of 1991.