Siew Moon Sim
Globalization and digitalization bring risks and controversy to businesses. A detailed approach to managing tax controversy helps companies navigate complexities and resolve matters efficiently.

Siew Moon Sim

EY Asia-Pacific Tax Policy and Controversy Practice Leader

Actively participates in internal and external activities to promote tax as a career. Builds strong and resilient families as a council member of Families for Life. Happily married. Mother of five.

Siew Moon is the EY Asia-Pacific Tax Policy and Controversy Practice Leader and works across all tax services. Along with the global tax controversy network, she helps clients to prevent, manage and resolve their tax controversies. She works with the EY global tax policy network to help develop and implement policy initiatives — both as an external and internal advisor to governments and companies.

With over 30 years of experience, Siew Moon’s clients include multinationals and local firms. She also advises various government authorities and regulators on tax matters.

Siew Moon provides tax compliance and advisory services. Apart from advising her clients on structuring, cross-border and M&A transactions, she also assists clients in negotiating and applying for tax incentives, as well as applying for advanced tax rulings and tax clarifications.

Siew Moon holds a Bachelor of Accountancy (First Class Honours) from the National University of Singapore.

How Siew Moon is building a better working world

“As the corporate landscape becomes more complex amid globalization and digitalization, the global tax environment looks to bring even more uncertainty – and perhaps challenges – to businesses. Together with EY tax policy and controversy professionals and others across our tax functions, using our extensive experience in working with governments and companies, I help EY clients to prevent, manage and resolve their tax controversies.”

Contact Siew Moon