Siew Moon Sim

Head of Tax

With over 30 years of experience, Siew Moon has served multinationals and local clients from a broad range of sectors and worked closely with various government authorities and regulators on tax matters.


Siew Moon provides tax compliance, controversy and advisory services to her clients. She advises her clients on structuring, cross-border as well as mergers and acquisitions transactions. She also assists her clients in negotiating and applying for tax incentives, as well as applying for advanced tax rulings, tax clarifications and remissions. Increasingly, with the change in the global tax landscape, she has been active in advising her clients on tax risk management and assisting them in negotiations with the tax authorities arising from cross-border disputes and controversy.


Siew Moon is a frequent speaker at internally and externally organized seminars. She graduated from the National University of Singapore with a Bachelor of Accountancy (First Class Honors) degree.

Siew Moon is a Fellow Chartered Accountant of the Institute of Singapore Chartered Accountants and a Fellow of CPA Australia. She’s also an Accredited Tax Advisor (Income Tax and GST) of the Singapore Institute of Accredited Tax Professionals. She is a Board member of The Tax Academy of Singapore and the Singapore Institute of Accredited Tax Professionals.