Laysym Sim
Laysym is an experienced tax professional with a degree in management. He has over 20 years of work experience, including with KPMG in Cambodia as well as another regional firm, where he was responsible for relations with the tax authorities. Laysym works with a wide variety of clients, both local and international, across a broad range of industry sectors, with a particular focus on the real estate and transportation industries. He has advised on tax planning for large property projects, employee benefits, and has conducted tax due diligence on several major acquisitions in Cambodia.
Laysym heads the firm’s tax compliance and tax disputes teams. He has a long and proven track record of successful defense of multinationals, banks, and property developers. He also leads our transfer pricing practice in Cambodia.
Education
- Maharishi Vedic University, BBA (Management)
- ACCA, Qualified Certified Accounting Technician
- Languages: Khmer, English, Thai
Affiliations
- Kampuchea Institute of Certified Public Accountants and Auditors (KICPAA)
Areas of Specialization
- Tax Advisory
- Compliance
- Business Advisory
- Transfer Pricing
Recent Publications
Recent News

Andersen in Cambodia donates much-needed supplies to Cambodian refugees
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Andersen in Cambodia and Vietnam shortlisted for the 2025 ITR Asia-Pacific Tax Awards
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Edwin Vanderbruggen Featured in Cambodia Investment Review
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