Datuk Johan Mahmood Merican was appointed as DNB's Chairman of the Board effective 20 May 2024. He is currently the Secretary General of Treasury, Ministry of Finance. Prior to that, he was the Deputy Secretary General (Policy) at the Ministry of Finance since March 2022.

Datuk Johan has served in the Government in various roles such as the National Budget Director at the Ministry of Finance, Deputy Director General of the Economic Planning Unit, and Chief Executive Officer of Talent Corporation Malaysia. Before serving the Government in 2004, he had worked for 9 years in corporate finance and accounting roles in the private sector.

Datuk Johan is a qualified Chartered Accountant of Institute of Chartered Accountants in England and Wales (ICAEW) and graduated with an Economics Degree from the University of Cambridge.