Osian has also worked as Head of Regulatory Policy for Qualifications Wales, the regulator of qualifications that are offered by recognised awarding bodies in Wales.
Mae Osian hefyd wedi gweithio fel Pennaeth Polisi Rheoleiddiol Cymwysterau Cymru, rheoleiddiwr cymwysterau sy’n cael eu cynnig gan gyrff dyfarnu cydnabyddedig yng Nghymru.