Dr Vassiliou is Professor of Haematological Medicine at the University of Cambridge, Member of Faculty at the Wellcome-MRC Cambridge Stem Cell Institute and a Consultant Haematologist at Cambridge University Hospitals. 
He studies the pre-clinical evolution, pathogenesis and treatment of myeloid malignancies. Highlights of his work include the co-discovery of the phenomenon of clonal haematopoiesis (CH), the first demonstration that individuals at high risk of acute myeloid leukaemia (AML) can be identified years in advance and the identification of hundreds of novel genetic vulnerabilities of AML, through the first genome-wide CRISPR screen focused on a human cancer, leading to the development of multiple new anti-leukemic treatments.