Supasit Boonsanong

Supasit 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.

Supasit Boonsanong is a partner in Nagashima Ohno & Tsunematsu and joint head of the firm’s energy industry group. He specializes in complex cross-border energy industry transactions, including project finance and mergers and acquisitions, and oil, gas, and petrochemical industry operations. He regularly advises leading energy and natural resource companies on projects, joint ventures, licensing, supply, construction, and financing agreements. He also specializes in negotiating engineering, procurement and construction contracts (EPCs) for process plants, conventional power plants, tank farms, and renewable energy installations (solar, wind, biomass, and waste conversion).

Supasit is chief of the legal team advising Thai government authorities on legislative amendments to the country’s petroleum laws, including drafting regulations, models of petroleum production sharing contracts, and risk service contracts under the Petroleum Act. He also teaches petroleum law and investment law at the Faculty of Law, Chulalongkorn University.

Supasit has over 18 years of experience at respected international law firms in Bangkok, and over 15 years as general counsel to Thailand’s National Petrochemical Company.

leading Projects and Energy lawyer

Chambers Asia-Pacific

2024

leading Project Development lawyer

IFLR 1000

2025