Tanadee Pantumkomon

Tanadee has a broad range of experience, spanning labor, tax, pharmaceutical law, medical law, cannabis law and transactional law. He regularly advises clients on mergers and acquisitions, project finance, power projects, petroleum developments, and has worked on litigation in the telecommunications sector. His work on petroleum, mining, and construction contracts has given him a deep understanding of Thailand’s environmental laws. He also has expertise in taxation and has worked with clients on matters related to land taxes, customs duties, and tax planning for engineering, procurement, and construction (EPC) contracts.

• LL.M., Harvard Law School (United States), 2009.
• LL.M. in International Taxation, New York University School of Law (United States), 2008.
• LL.B. (Gold Medal, ranked 1st in class and First Class Honors), Chulalongkorn University, 2006.

• Member, Thai Bar Association.
• Member, Harvard Law School Association of Thailand.
• Licensed Notarial Services Attorney.
• Registered Arbitrator with the Thai Arbitration Institute (TAI), Office of the Judiciary, 2025.
• Qualified Labor Relations Counsel, Ministry of Labor, Department of Welfare and Labor Protection.

• November 2023 - Present: Partner at ILAWASIA and ILAW (Thailand) Company Limited.
• 2021 – 2023: CEO at Salus Bioceutical (Thailand) Co., Ltd.
• 2019 – 2021: Counsel at Tilleke & Gibbins
• 2018 – 2019: Partner at The Phenomena Limited
• 2016 – 2018 : Senior Associate at Chandler MHM Limited.
• 2015 – 2016: Associate at Nagashima Ohno & Tsunematsu (Thailand) Co., Ltd.
• 2009 – 2015: Associate at Chandler MHM Limited.
• January – May 2016 (Secondment) In-House Counsel: Energy Regulatory Commission of Thailand.
• 2006 – 2007: Associate at Baker & McKenzie Ltd.

• asialaw 2025 Rankings: “He is highly capable of identifying and minimising contractual risks through sound legal understanding.”

1. Mergers and Acquisitions (M&A)
   • Provide legal service and advisory on shareholders’ agreement for bidding deep-sea port project.
   • Provide legal service to foreign buyers and investors for acquiring 5 condominium projects in Bangkok.
   • Provide legal service on share acquisition of lubricant trading companies and conduct due diligence and negotiate on share acquisition agreement.
   • Provide legal service on fund raising, drafting shareholders’ agreement between Thai investors and foreigners, regulatory affairs and licenses and permits application, including FDA approval for construction plant, GMP certificates, supply chains, contract farming and EPC Contract for pharmaceutical manufacturing plant.
   • Provide legal service on conducting legal due diligence in a case of Thai power plant (IPP) amalgamation.
   • Provide legal service for Japanese convenience store on the acquisition of 376 retail convenience shops from one of Thailand’s major consumer manufacturing companies.
   • Provide legal service for a major energy company in Thailand, on a cross-border investment in a top tier international retail/wholesale group with businesses across Europe.
   • Provide legal service for a renewable energy company, one of the largest renewable energy companies in Thailand, on financing of renewable energy projects across the country.
2. Renewable Energy Projects
   
   • Acting for Hydro Engineering on project development and project financing for the design, development, construction, operation, and maintenance of the hydroelectric power plant in Lao PDR.
   • Acting for a financial institute on project financing, legal due diligence and project financing during construction phase of one of the largest hydroelectric power plant in Lao PDR.
   • Acting for project operator in one of Wind Farm Project in Lao PDR, a project of 1,200 MW during development phase.
   • Acting for one of the largest renewable energy companies in Thailand, on financing of renewable energy projects across the country, preparation of joint venture agreement between shareholders and acquisition of solar power plant projects in Thailand.
   • Acting for several roof-top solar projects in Thailand on financing of renewable energy projects across the country and acquisition of solar power plant projects in Thailand.
   • Acting for a 45 MW wind farm project; including advising on project development, licenses and permits, construction contracts, BOI support, operation and contract management.
   • Acting on litigation case of warranty of power generation on solar power plant project, acquiring licenses and permits related to solar power plants.
3. Oil and Gas Projects
   • Acting for a major energy company in Thailand, on a cross-border investment in a top-tier international retail/wholesale group with business across Europe.
   • Acting for a power company on developing the electricity business in Thailand and neighboring countries.
   • Acting for JV food-grade plastics and sustainable packaging solutions company on review of documents including: a power purchase agreement with Electricity Generating Authority of Thailand; a fuel sales gas agreement; EPC contracts; and a project management agreement regarding project financing for construction of a power plant in Rayong, Thailand.
   • Acting for one company operating in the renewable energy and clean energy sector on (i) development of a gas-fired combined-cycle 116 MW power plant in Ratchaburi, Thailand, and on, (ii) negotiation of the   financing documents and security documents for the USD 528.3 million financing.
   • Acting as a consultant on a study under the Energy Regulatory Commission (ERC) Law Reform Project including regulatory reform affecting Thailand’s competitiveness in the natural gas market, as well as on eliminating monopoly in any part of the natural gas supply chain. Closed in April 2016.
   • Advising one major petroleum groups of company on the Joint Development Area (JDA) gas purchase, pipeline and project.
   • Advising on the construction of the Trans-Thailand-Malaysia Pipeline Project.
   • Advising on LNG Procurement, as a team member with an international law firm.
   • Advising on the preparation of Gas Sale and Purchase Agreements with various industrial users.
   • Advising on the amalgamation between group of companies in petroleum sector.
   • Acting for one of electricity generation company on developing cogeneration power plants for Thailand’s Small Power Producer (“SPP”) projects.
   • Acting on developing a gas-fired power plant for Thailand’s Small power Producer (“SPP”) projects.
   • Acting as leading counsel for a Japanese company as buyer for a transaction of share acquisitions of 4 inbound petroleum projects in Thailand.
4. Atomic Energy Project
   • Acting as leading legal counsel for EPC Contractor which is an enterprise of foreign government on atomic energy project in Myanmar, analysis of local laws and regulations and construction agreement and supply agreements for atomic energy project.
5. Cold Energy Project
   • Acting for leading cold energy company in Thailand for construction agreement, shareholding structure and project agreements.
   • Petrochemical and Refinery Projects
   • Acting for on petrochemical plant development including, project planning, project construction bidding and on preparation of supply contract(s) and construction contract(s).
   • Acting on development of a hydrogen peroxide plant in Thailand and litigation for environmental case in Thailand.
   • Acting on olefins project, and on a co-generation unit in the 1980’s, prior to liberalization of the power sector in Thailand.
   • Acting on the amalgamation of these two upstream petrochemical companies in Thailand.
   • Acting for one of Thai chemical manufacturing company on development of a hydrogen peroxide plant in Thailand.
   • Acting on the merger of listed affiliates.
   • Acting for the largest petrochemical company in Thailand, on project planning, project construction and on license agreements and financing for major projects.
   • Acting on development of a phenol plant, and a bis-phenol plant in Thailand.
   • Acting on development of an ethane cracker project, an LDPT project, and an LLDPE project.
   • Acting on major hydrogen peroxide expansion project and on environmental issues.
   • Acting on several new petrochemical investment projects in Thailand, including its joint venture project with one major multinational chemical corporation to construct the largest crude hydrogen peroxide plant in the world.
   • Acting for a group of leading Thai petrochemical companies on project planning, project construction bidding, and on preparation of supply and construction contracts.
6. Automobile Industry
   • Supported one of official national sales and distribution company on contract drafting, negotiation and comments of dealer agreement, executive employment agreement, construction agreement and spare part supply agreement, analysis on consumer protection law on advertisement and sale and purchase agreement.
   • Supported one of leading global supplier to the automotive industry on contract drafting, negotiation and comments of supply agreement, factory construction agreement, license and permits of construction, work safety control laws, employment agreement and internal forensic investigation on corruption and labor dispute, executive employment agreement.
   • Advised one of Japanese Car Manufacture Plant on labor dispute with labor union, negotiate and settlement with labor union.
   • Advised one of Thai automotive parts distributor and supplier on proceeding with criminal charges against the debtor under the law governing checks and conducting asset investigation and enforcement of judgment.
7. Tax Advices
   • Provided comprehensive legal consultation on a wide range of tax law issues, offering clients clear and practical guidance to navigate complex regulatory frameworks for one of Thai public leasing company.
   • Provided a legal opinion on matters relating to Thai inheritance tax, delivering clear and authoritative guidance to the client on complex statutory requirements and practical implications for one of Thai advisory and consulting company.
   • Delivered comprehensive tax advisory services to a Thailand-based advertising and marketing company undergoing restructuring, providing guidance to enhance operational efficiency, support expansion, and ensure compliance with evolving regulations.
   • Engaged by a South African company operating in IT services and the import and export of machinery to provide tax advisory services in Thailand, with a particular focus on import VAT implications.
   • Engaged by an IT and marketing company in connection with its business expansion into Southeast Asia, providing comprehensive legal and tax advisory services to support the client’s regional growth strategy.
   • Provide tax consultation for foreign residents in Thailand.
   • Provision of legal services in relation to the annual filing and payment of property tax.
   • Provision of legal services in relation to the payment and tax application for artists performing in Thailand.
   • Provision of tax consultancy services on VAT, in collaboration with the accounting firm, including conducting a comprehensive legal analysis and assessing potential tax risks.
   • Assisted a renowned Thai street food brand, with the filing of signboard tax.

• 2009 – Present: Chulalongkorn University Faculty of Law, Special Lecturer on Petroleum Law, Project Finance, and Legal Writing.
• January – May 2016 (Secondment) In-House Counsel: Energy Regulatory Commission of Thailand.
• 2010 – 2016: International College of Rajamangala University of Technology, Special Lecturer on International Business Law and International Finance and Banking.
• 2009 – 2016: Prince Songkla University, Special Lecturer on tax and merger and acquisition laws.
• Not for Sale Foundation (Anti-Human Trafficking NGO), Legal Council.

1. Taxation & Corporate Incentives
   • Thailand: DEPA Supports 150 per cent Corporate Tax Deduction (Dec 2025)
   • Thailand’s BOI “Smart & Sustainable Industry” Measure: Tax Incentives, Effective Dates, and Legal Implications (Nov 2025)
   • Tax on Capital Gain Under Cambodian Taxation Law (Nov 2025)
   • Singapore: The Advantages of Singapore Corporate Income Tax (Jun 2025)
   • Thailand's Top-up Tax Decree: Aligning with Global Standards while Supporting Investment (Jan 2025)
   • The Evolution of Taxation in Thailand’s E-commerce (Jan 2025)
   • Corporate, Commercial & Investment Law
   • Laos : Essential Update for Online Retailers Navigating the E-Commerce Regulations 2026 (Jan 2026)
   • ‍Laos: Legal and Policy Framework for the Contribution of Registered Capital in the Lao PDR (Nov 2025)
   • Myanmar’s 2025 Investment Privileges for Foreign Companies: Unlocking New Opportunities (Jul 2025)
   • Laos: Legal and Policy Framework for Industrial Estates in the Lao PDR (Sep 2025)
   • Cambodia: Trust: Beyond Trust Administration in Business in Cambodia (Jun 2025)
   • Myanmar: Dissolution of a Company in Myanmar under Insolvency Law (May 2025)
   • Laos: Payment for the Purchase and Sale of Land Use Rights through Online Platforms in Lao PDR (May 2025)
   • Laos: Establishing an NGO in Lao PDR (Mar 2025)
   • Myanmar Opens New Export Opportunities for Foreign Companies (Mar 2025)
   • Tourism Business in Laos: A Guide for Investors and Entrepreneurs (Feb 2025)
   • Doing Business, Making a Difference for Entrepreneurs (World Bank/IFC, 2010 & 2011)
2. Regulatory & Compliance
   • Myanmar: Noticeable Facts to Be Followed by Companies Recently Issued by DICA Myanmar (Oct & Sep 2025)
   • Myanmar: Cybersecurity Law No. 1/2025 Now in Effect: Regulatory Requirements Enforced from July 30, 2025 (Aug 2025)
   • Laos: A New Legislation regarding the Payment Service System (Part 1 & 2) (Jul 2025)
   • Laos: New Legislation regarding the Fuel Quality Inspection and Recognition Procedures in Lao PDR (Jun 2025)
   • Laos: Operation of Buy and Sale Gold Business through Electronic Platform (May 2025)
   • Thailand: An Overview of Personal Data Protection Law in Thailand (Apr 2025)
   • Thailand: Scrutiny Guidelines to Prevent Land Holding for the Benefit of Foreigners (Apr 2025)
   • Thailand: Director’s Criminal Liabilities under Thai Laws (Mar 2025)
3. Labour & Employment
   • Cambodia: Declaration on the Opening and Closing of Enterprises and Establishments under the Labour Law of Cambodia (Aug 2025)
   • Cambodia: Working Overtime Outside of Normal Working Hours, Working on Paid Holidays, and Suspending Weekly Rest Periods, Prakas 2025 (May 2025)
   • Trade, Customs & Cross-Border Transactions
   • Cambodia: Customs Formalities for Goods of United States Origin (Oct & Sep 2025)
4. Industry-Specific & Sectoral Regulations
   
   • Thailand: New Legal Guardrails for Thailand’s Wellness Industry (Oct 2025)
   • Thailand Petroleum 25th Onshore Bidding Round: Invitation for Petroleum Exploration and Production Rights (Feb 2025)
   • The Rise of Data Centers: Why Thailand is Becoming a Hotspot for Colocation Services (Jan 2025)
   • Multiple articles in PTIT Focus (Petroleum Institute of Thailand) on oil & gas law and environmental issues.

• Corporate and Commercial
• Mergers and Acquisitions (M&A)
• Power, Energy, and Major Projects
• Tax