Professor Field holds a number of roles at various organisations including Chair at Walsall Healthcare NHS Trust, Trustee at Nishkam Healthcare Trust and a Trustee for Pathway Healthcare for Homeless People.
Prior to his role of chair, he was Chief Inspector of General Practice, Primary Medical Services and Integrated Care at the Care Quality Commission (CQC). He has held several board positions in the NHS including, Deputy National Medical Director at NHS England, Regional Postgraduate Dean for NHS West Midlands and Chairman of the NHS Inclusion Health Board at the Department of Health. He also held the position of Chairman of The Royal College of GPs, and has been a faculty member at the Harvard Macy Institute of Harvard University in the USA.
He has been awarded a number of honorary degrees and also holds academic appointments at the University of Birmingham and the University of Warwick.