Sebastian Sim began his journey in the media field as a producer-presenter on Power98FM and was credited for raking in the highest listener ratings on the station for his evening drive-time belt. In 2008, Sebastian became the youngest Programme Director of a radio station in Singapore. He strategized the growth of the station and generated effective solutions for the station’s clients, bringing the station to a top 10 ranking amongst all radio stations in Singapore, according to AC Nielsen. In 2010, Sebastian made his crossover to television presenting when he became the anchor presenter for the football news programme 'FC Daily' on Starhub's 'Football Channel' and a weekly sports magazine show 'SuperSports Arena Special' on Starhub's 'SuperSports Arena' channel. Sebastian is also an accomplished event host, voiceover artiste and actor, having done both television as well as theatre in English, Chinese and Malay. Since joining Temasek Polytechnic (TP) in 2014, Sebastian has helped develop the curriculum and mentor students in the field of integrated media. Sebastian also helped establish TP’s campus radio station, RadioActive.