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Supasit Boonsanong

Supasit Boonsanong

Partner

Bangkok Office

Supasit Boonsanong

Supasit Boonsanong

Partner

Bangkok Office

People
Supasit Boonsanong

Supasit Boonsanong has extensive experience in complex cross-border energy transactions, including project finance, M&As, and operations in renewable, oil, gas, and petrochemical sectors. He advises leading energy companies on project development, joint ventures, licensing, supply, construction, and financing agreements, and is skilled in negotiating EPC contracts.

He leads the legal team advising Thai authorities on petroleum law amendments and teaches petroleum and investment law at Chulalongkorn University.

With over 20 years at top international law firms in Bangkok and over 15 years as general counsel for Thailand’s National Petrochemical Company, Supasit offers extensive legal expertise in the energy field.

1984
Chulalongkorn University (LL.B.)
1983 - 1986
APA International Law Office
1987 - 2000
Manager of Legal Office, National Petrochemical PLC
1991
The Centre for Energy, Petroleum and Mineral Law and Policy, University of Dundee (LL.M.)
1994 - 2025
Special Lecturer, Faculty of Law, Chulalongkorn University
1996 - 1997
Special Lecturer, Faculty of Engineering, Kasetsart University
2000 - 2018
Partner, Chandler & Thong - ek Law Offices Ltd. (currently Chandler Mori Hamada Limited⁠)
2018 - 2019
Partner, The Phenomena Ltd., Bangkok
2019 - 2025
Partner, Tilleke & Gibbins International Ltd., Bangkok
2025 - present
Partner (Thailand), Nagashima Ohno & Tsunematsu
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