Gwilym has worked as a presenter for TLC! And Techniquest since September 2012, delivering science and maths Outreach to schools in Gwynedd, Ynys Mon and Aberconwy. In his spare-time he is a football referees instructor for the Football Association of Wales. Prior to being an Outreach presenter, Gwilym was a primary school head-teacher for 21 years; before this working as a deputy head teacher and teacher for nine years.
A Mathematics graduate, Gwilym has developed a wide range of cross-curricular Mathematical and Scientific activities for KS2. During his teaching career, Gwilym was also a member of a number of educational steering committees e.g. Gwynedd Council systems group, Bangor University Student Mentoring Committee and was also a mentor for newly-appointed head teachers. Gwilym was also a peer inspector for Estyn. Gwilym is fluent in both Welsh and English.