Aun is renowned as an actor in television dramas and in commercials. He has also featured in several music videos. Some of his recent projects, include Sab Phu Sa, a television drama, a Chevrolet Zafira commercial and Fung Hua Jai Tua Eng, a Masha Wattanaphanitch music video. Now, Witthaya has branched out by starting a new business, called “Coco Custard”, a dessert cafeteria.