Mr Ong is Chairman of the Accounting and Corporate Regulatory Authority (ACRA). Mr Ong was formerly with the Monetary Authority of Singapore (MAS) for 35 years and last served as its Deputy Managing Director (Financial Supervision). During his tenure in MAS, he had overseen key functions of monetary policy, investment management, financial development and financial supervision. Mr Ong is currently an independent director of UOB Bank Limited and AIA Group Limited. He is also a member of the GIC Risk Committee, Director of Temasek Trust Foundation Advisors Singapore Ltd, a trustee of the IFRS Foundation and a member of the advisory board of CEIBS-APS Centre for Financial Markets (CAC). Mr Ong graduated with an Honours Degree in Chemical Engineering from the National University of Singapore in 1985. He was awarded the Public Administration Medal (Gold) (Bar) in 2021.