Osian began his stage career at the tender age of nine, impressing audiences with his performances in over twenty different shows. However, his first professional credit came at the age of six, when he appeared in a short S4C film titled 'I Ffwrdd a ni'.
Since 2007, Osian has been working consistently in the film and television industry. One of his notable roles was playing Twm Puw in the Welsh television program '2 Dy a ni', which aired on S4C for two series. In 2011, he landed the part of Mark Pritchard in Warp Productions' film 'Submarine'. Additionally, he had a role in the S4C Welsh drama 'Pobol Y Cwm', playing the character of Bathroom Salesman. In 2012, he recorded an audio book, taking on the dual roles of Narrator and Eric Wasserman in the Avalon Books novel 'Wait a Lonely Lifetime'.
Osian is heavily involved in his local theatre community in Carmarthen, and has performed with numerous groups in the area. Recently, he took to the stage in 'Guys and Dolls' with CAOS in May 2012, and again with Saundersfoot Footlights a few weeks later, playing the role of Sky Masterson on both occasions. The latter performance was a last-minute call-up due to unforeseen circumstances.
Looking ahead, Osian will be working with Wales Millennium Centre and Theatrena n'Og!