Ong Chong Han is a music degree graduate from UCSI University. He is the drummer of MUSEIGEN (formerly known as #IV), a jazz fusion band. The band has performed at notable music/jazz festivals such as The Malaysian Jazz Piano Festival, The International Jazz Day Festival and the Penang Island Jazz Festival.

He is also the drummer of MCYZ, a band with a main focus on reworking popular tunes into different genres, especially jazz. As a sideman, he has performed with various musicians like Michael Veerapan, Tay Cher Siang, Julian Chan, Rizal Tony, and Toro Cheng.

Throughout his years as a drum instructor, he has developed his own teaching method with the goal of providing a well-rounded approach to drum education.