Irwan is a Professor of Finance. His research interests are predominantly in market microstructure, behavioral finance, asset pricing, banking, and other related field of finance.

In 2013, Irwan and several Indonesian finance scholars found the Indonesian Finance Association (IFA), and he is appointed as its inaugural President. Since June 2013, he also serves as one of the board members of the Asian Finance Association (AsFA).

He currently holds an administrative position in the Faculty of Economics and Business as the Director of Graduate School of Management. He was also entrusted as the Deputy Director of Master of Management Program (2005-2009).