Sion is a hugely experienced screen, stage, radio and voiceover actor. Best known for roles in PHONESHOP and THE INDIAN DOCTOR. Welsh language TV credits include leading roles in RYBISH, DIM OND Y GWIR and TIR for S4C.
His many theatre credits include the highly acclaimed one-man show LAST CHRISTMAS, which he has performed at the Edinburgh Fringe, the Soho Theatre and on tour. He has also worked with National Theatre Wales, Sherman Theatre, Bristol Old Vic, Theatr Genedlaethol Cymru and over 20 productions for Clwyd Theatr Cymru.
Sion is also regularly heard in BBC radio dramas, including Radio 4 Comedy BAD ARK and the BBC Radio 3 adaptation of THREE SISTERS, AUGUST 1914 and THE TSARS OF RUSSIA season.