Stuart leads the Medical Physics team of approximately 140 staff at University Hospital Birmingham (UHB) NHS Trust, and is also Honorary Professor of Physics in the School of Physics and Astronomy, University of Birmingham. He has held national leadership roles including a period as President of the British Institute for Radiology. He is currently a member of the Board of Counsellors of the International Society for Neutron Capture Therapy and also a member of a working group on BNCT on behalf of the Particle Therapy Co-Operative Group (PTCOG). He is chair of the working group which is developing a dosimetry code of practice for scanned proton beams which should be published during 2021.