Dion is a sought-after voiceover artist,  effortlessly transferring his Welsh tones to a deep and honest delivery style with an exceptional gift for characterisation.

He his acting journey early, landing a role in ITV’s The Snow Spider at just 13 years old. Since then, he has built a diverse and enduring career across theatre, television, film, and voiceover. A graduate of Trinity College St David’s with a BA in Theatre, Media and Music, he later completed a diploma in Acting in 2001, laying the foundation for a lifelong dedication to performance.

On screen, Dion’s credits include Solomon and Gaenor, Under Milk Wood, Petroleum Spirit, and television roles in Torchwood and The Indian Doctor (BBC), Stella (Sky 1), and a wide range of dramas on S4C including Y Pris, Tair Chwaer, Amdani, Y Glas, Pethau Bychain, and Rownd a Rownd. Younger viewers will recognise him from beloved S4C children’s shows such as Jen a Jim Pob Dim, Y Doniolis, and Ditectifs Hanes.

His theatre credits also include A Child’s Christmas in Wales, A Christmas Carol and Servant of Two Masters (Wales Theatre Company), Rwan/Nawr (Theatr Genedlaethol Cymru), and Up & Under (Black Rat Theatre Company). Dion has worked extensively in Welsh-language pantomime and continues to contribute to Welsh arts across media.

A skilled writer and voice performer, Dion has also scripted children’s TV sketches and recorded numerous radio dramas. His recent work includes online productions with Theatr Na n’Óg, such as Aesop’s Fables, a radio adaptation of Halt! Who Goes There?, and a streamed one-man performance of Cân Pegi, directed by Christian Patterson.

His gaming work highlights his remarkable versatility—able to shift effortlessly from grounded, natural delivery to bold, stylised character voices across genres and moods.