Professor Steven GE Marsh BSc PhD ARCS, is a British immunogeneticist and an internationally recognised leader in the field of and immunogenetics having published more than 300 scientific papers on the subject. Marsh holds a professorship in the subject at University College London and the deputy directorship of research and leader of the HLA Informatics Group at the charity Anthony Nolan.
Marsh has made contributions to research of Human Leukocyte Antigen nomenclature as Chair of the World Health Organization's Nomenclature Committee for Factors of the HLA System.