He also works for numerous exam boards, was a pioneer for the Curriculum for Wales, and has supported education as a scrutineer and school governor.
Yn ychwanegol at hynny roedd yn un o'r arloeswyr ar gyfer y Cwricwlwm i Gymru, ac mae wedi cefnogi'r maes addysg fel archwiliwr a llywodraethwr ysgol.