Dato' Kamarudin is the co-founder of Tune Group. He is also the Deputy Group Chief Executive Director of AirAsia since December 2001.

Prior to joining Tune Group and AirAsia, Dato' Kamarudin worked in Arab-Malaysian Merchant Bank from 1988 to 1993 as a Portfolio Manager, managing both institutional and high net-worth individual clients' investment funds. In 1994, he was appointed Executive Director of Innosabah Capital Management Sdn Bhd, a subsidiary of Innosabah Securities Sdn Bhd. He subsequently acquired the shares of its joint venture partner of Innosabah Capital Management Sdn Bhd, which was later renamed Intrinsic Capital Management Sdn Bhd.

Dato' Kamarudin received a Diploma in Actuarial Science from University Technology MARA (UiTM) and was named the "Best Actuarial Student" by the Life Insurance Institute of Malaysia in 1983. He received a B.Sc. degree with Distinction (Magna Cum Laude) majoring in Finance in 1986, and an MBA in 1987 from Central Michigan University.