Professor Snowden is consultant haematologist and director of the Blood and Marrow Transplant (BMT) Programme in Sheffield, UK. Nationally, he has delivered on key leadership roles in BMT and hemato-oncology at a UK public health level, including clinical lead for various NICE Guidelines and chair of the NHS England Clinical Reference Group for BMT (2016-20).

He is currently President of the British Society of Blood and Marrow Transplantation and Cellular Therapy (2021-22). Internationally, he has a long association with the European Society for Blood and Marrow Transplantation (EBMT) and the international accreditation organisation, JACIE. He has been a member of the EBMT Board and Scientific Council as Autoimmune Diseases Working Party Chair (2016-20) and now as EBMT Secretary (2020-24).

Academically, he has contributed to the fields of BMT, hematology-oncology and auto-immunity with co-authorship of more than 300 publications. Professor Snowden’s research has been recognised on the NHS Parliamentary Awards. He has been awarded honorary professorships by The University of Sheffield and University College London.