Gill was appointed as medical director, digital healthcare, in October 2019. This is a new position and highlights the strategic importance of digital healthcare at UCLH. Prior to this, Gill had been medical director, specialist hospitals board since 2010. Gill graduated from Cambridge and trained in renal and general medicine at Hammersmith Hospital and the Royal Postgraduate Medical School, completing a PhD on the biology of systemic vasculitis. Between 1995 and 2010 she held consultant-level posts at Imperial College, Hammersmith Hospitals and Imperial College Healthcare Trusts, with additional responsibilities as Director of Postgraduate Medical Education and Professional Development, Clinical Director and latterly Director for the Medicine Clinical Programme Group. Gill is a member of the Faculty of Medical Leadership and Management.