He was appointed as a deputy
Chief Medical Officer (CMO) for England in March 2006, In late 2007 he left this post and was director of clinical quality of the
Health Foundation. In October 2016 he was elected as the RCGP's Vice Chair for External Affairs. In July 2019, he became the Chair elect of the RCGP council, to succeed
Helen Stokes-Lampard. In November 2019 he took up role of Chair of RCGP for a three year term. He also holds a Professorship in Health Care Improvement at
University College London. Marshall was also a 1998-1999
Harkness Fellow, spending a year researching health policy in the United States. ==Awards and honours==