Mae ganddo brofiad helaeth mewn rolau arwain yn GIG Cymru, yn gyntaf fel aelod o Awdurdod Iechyd De Morgannwg, yna fel Is-gadeirydd a Chadeirydd Awdurdod Iechyd Bro Taf, ac, hyd at fis Rhagfyr 2008, ef oedd Cadeirydd Ymddiriedolaeth GIG Caerdydd a'r Fro. Yn ystod y cyfnod hwn, bu'n Gadeirydd arweiniol yr Ymddiriedolaeth a hefyd yn Gadeirydd Conffederasiwn GIG Cymru.
He has considerable experience in leadership roles in NHS Wales, first as a member of South Glamorgan Health Authority, then as Vice Chair and Chair of Bro Taf Health Authority, and until December 2008 was Chair of Cardiff and Vale NHS Trust.  During this time, he was lead Trust Chair and also Chair of the Welsh NHS Confederation.