Supasit Boonsanong

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F: +66 2056 5678




Thai, English


LLM, Center for Petroleum Law and Mineral Studies, University of Dundee, U.K.

LLB, Chulalongkorn University

Supasit Boonsanong is a partner in Tilleke & Gibbins’ corporate and commercial department 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 instalations (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.

  • Advised a Thai storage tank services company on bidding preparation and negotiation of project documents for two EEC megaprojects for ports. The projects were valued at THB 30 billion each.

  • Advised a SET-listed electricity distribution company in connection with its proposed investment in a rooftop solar company.

  • Advised a publicly listed Thai printing company in connection with its acquisition of the printing business of one of Thailand's largest media companies.

  • Advised a SET-listed industrial park company, as the borrower, in connection with a THB 1.625 billion loan arrangement from a Singaporean bank.

  • Acted as legal advisor for drafting the Department of Mineral Fuels' regulations and model agreements on product-sharing agreements and risk service contracts, and assisted with decommissioning a national oil company.

  • Advised project shareholders from Thailand and Korea on cross-border project development and project financing for design, development, construction, operation and maintenance of a major "greenfield" 65 MW hydroelectric plant in Laos.

  • Advised a major Thai energy company on cross-border investment in a leading international retail/wholesale group with businesses across Europe.

  • Advised a Thai small power producer (SPP) on the development and financing of a major gas-fired, combined-cycle power plant in Thailand, including advice on structuring the EPC contract and drafting all other project agreements.

  • Conducted due diligence on the rehabilitation process of a state-owned telecommunications company.

Datesort icon Title
November 13, 2020

Tilleke & Gibbins Named Thailand Firm of the Year in Who’s Who Legal Awards 2020

Tilleke & Gibbins has been named Thailand Firm of the Year at the Who’s Who Legal Awards 2020, held on November 12, 2020. Notably, this award marks the fifth consecutive year that Tilleke &...

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November 6, 2020

Tilleke & Gibbins Nominated for Three Women in Business Law Awards Asia-Pacific 2020

Tilleke & Gibbins has been nominated in three firm-wide categories in the Women in Business Law Awards Asia-Pacific 2020. The awards, which are organized each year by Euromoney to recognize firms...

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October 29, 2020

AMCHAM Thailand Recognizes Tilleke & Gibbins at 2020 CSR Excellence Awards

On Tuesday, October 27, Tilleke & Gibbins was singled out for an award for exceptional corporate social responsibility (CSR) work during the past 12 months at the 2020 CSR Excellence Awards, held...

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October 20, 2020

Tilleke & Gibbins among Southeast Asia’s Top Corporate Firms in IFLR1000 2021 Rankings

In the recently released IFLR1000  2021 rankings of the world’s best corporate and financial law firms, Tilleke & Gibbins was honored with a record 15 firm-wide rankings across all...

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September 21, 2020

ALB M&A 2020: Tilleke & Gibbins Earns Repeat Honors in Thailand and Vietnam Rankings

The Asian Legal Business  (ALB ) 2020 M&A rankings were recently released, and Tilleke & Gibbins has again been recognized for its consistently strong M&A practice across the...

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Datesort icon Title
October 15, 2020

Practical Law: Electricity Regulation in Thailand 2020

Charuwan Charoonchitsathian, Supasit Boonsanong

Practical Law has published the 2020 online version of Electricity Regulation in Thailand: Overview, a Q&A-style guide that provides detailed overviews of power issues and regulations for...

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September 16, 2020

COVID-19 Resource Center

As the global COVID-19 situation develops, Tilleke & Gibbins is dedicated to ensuring that our clients remain up to date on the most important legal developments in Southeast Asia as they happen...

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June 15, 2020

PTIT Focus: Restrictions Eased on Electronic Board and Shareholder Meetings

Auradee Pantumkomon Wongsaroj, Kobkit Thienpreecha, Natthanit Mallikamal, Supasit Boonsanong, Tanadee Pantumkomon

From April 19, 2020, Thai law will allow board meetings and shareholders meetings to take place entirely via electronic means, and attendants will no longer be required to be physically present in...

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May 15, 2020

PTIT Focus: Thailand Issues Regulations for Procurement of Electricity from Very Small Power Plants

Supasit Boonsanong, Auradee Pantumkomon Wongsaroj, Joseph Tomkiewicz, Praew Annez, Tanadee Pantumkomon

In order to qualify as a VSPP, a power producer must generate no more than 10 MW per project, and must comply with the requirements and restrictions set by the Executive Committee of Power Purchase...

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March 25, 2020

23rd Round of Petroleum Bidding for Exploration and Production Delayed Indefinitely Due to COVID-19 Outbreak

Tanadee Pantumkomon, Supasit Boonsanong, Joseph Tomkiewicz

The Ministry of Energy has issued an order to delay the 23rd round of bidding for petroleum exploration and production, as reported on the official website of the Department of Mineral Fuels (DMF)....

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