After graduation (in 1998) he went on to assist audiographer Deepan Chatterjee at Director Priyadarshan's 4 Frames Sound Company before venturing out independently.
Udayakumar has worked with both veterans and new generation directors including P.Vasu, R.Sunderrajan, Sundar.C, Hari, Pa.Ranjith, Siruthai Siva, Vetrimaran, M. Sasikumar, Bala, Samuthirakani, M. Rajesh, Ponram etc.
His notable works includes Asuran, K-13, Kabali, Visaranai,[1] Peranmai, Vivegam, Chennai 600028 II, Madras, and Demonte Colony.
His sound mix for Asuran[2] played an important role in the commercial success of the film and was lauded for his work.
Apart from sound designing and mixing, recently he made his foray into another domain, by doing script doctoring for the Tamil film K-13.