[2] Across his career, Karunaratne worked in numerous areas, including direction, script writing, research, program production management, television presentation, and as a compere.
He was exposed to television work by his aunt on his mother's side, Praba Ranatunge, who was the first female newsreader for the Sri Lanka Broadcasting Corporation.
[5] His first job in the industry began on 1 February 1983, when he started working at the Sri Lanka Rupavahini Corporation as a trainee producer.
[7] Karunaratne hosted notable programmes like 9.05, Hathata Hithata Hadawathata, Hapan Padura, Mang Podi Kale, Prathiba, Jeewithaya Lassanai teledrama, Sundara Senasurada, Hansa Wila, Maha Sinhale Wansa Kathawa, Dutu Nodutu, Perawadana, and Loke Wate.
[9] His body was found the next day and the cause of death was determined to be an intra-ventricular hemorrhage due to ruptured blood vessels in the brain.