During his time at Welsh Government he had responsibility for liaison with the Boundary Commission and for advising Welsh Ministers on policy and legislative proposals in relation to the Commission.
Yn ystod ei gyfnod yn Llywodraeth Cymru, bu’n gyfrifol am gysylltu â’r Comisiwn Ffiniau a chynghori Gweinidogion Cymru ar gynigion polisi a deddfwriaethol yn ymwneud â’r Comisiwn.