Best remembered for playing comic roles, Singamuthu is known for his vast contribution to the Tamil industry, making his debut in 1987 with Neram Nalla Irukku. In a career spanning across three decades, the supporting actor has appeared in the movies Eni Ellam Sugame, Sri Bannari Amman, Vetrivel Sakthivel, Vanthaan Vendraan, Nadhikal Nanaivadhillai, Naalu Peru Naalu Vidhama Pesuvanga, Dhilluku Dhuddu, and Ranam among many others.