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Prakarn Sombunying

Senior Associate

Biography

Prakarn Sombunying is a senior associate in Tilleke & Gibbins’ dispute resolution department in Bangkok, where he specializes in administrative law, anticorruption, and regulatory disputes. He is a seasoned trial strategist advising both domestic and international clients on the resolution of high-stakes and complex litigation in a wide range of industries, including food and beverage, financial services, telecommunications, real estate, and energy.

Prakarn’s clients rely on his background and experience to provide them with specialized insights into the practice of Thai courts as well as operations of authorities and government agencies. Prior to joining Tilleke & Gibbins, Prakarn worked at multiple prominent law firms in Thailand and as a hands-on private practitioner, guiding clients through the Thai judicial process to protect their business interests and achieve their strategic objectives.

Prakarn holds an LLB from Thammasat University and an LLM in Public and International Law from the University of Melbourne Law School, as well as a graduate diploma in public law from Thammasat University. He also completed a certificate course from Thammasat University on Thailand’s Public Procurement and Supplies Administration Act. He is admitted to the Thai Bar and has completed the barrister-at-law training from the Thai Bar Association and the Lawyers Council of Thailand.

Experience

  • Advised a multinational oil and gas conglomerate on Thai constitutional and administrative law in relation to disputes with Thai government agencies arising from the government’s implementation of petroleum regulations and interpretation of concession contracts.
  • Advised leading Thai telecommunication giants on litigation strategies for examining the government’s public auction of telecom licenses, satellite orbital business permits, and merger of commercial enterprises.
  • Represented a global financial institution in a THB 3.7 billion tortious dispute against a leading international audit and consulting service company due to audit negligence related to one of Thailand’s most talked-about corporate scandals related to a company listed on the Stock Exchange of Thailand.
  • Represented leading Thai professional football clubs in an arbitration dispute at Tribunal Arbitral du Sport in Lausanne, Switzerland, against a football association over conflicts arising from quota allocation for the Asian Football Confederation (AFC) Champions League.
  • Represented a former top officer of Thailand’s state petroleum exploration corporation against anticorruption accusations by the National Anti-Corruption Commission (NACC) in connection with performance of duties related to the state enterprise’s procurement of equipment.
  • Represented a former executive of a state military hospital in the Administrative Court seeking judicial review of the legality of an administrative directive from the supreme commander of the Royal Thai Armed Forces pertaining to a compensatory claim for damages arising from inaccurate inspection of construction work.
ABOUT Prakarn

Location

Languages

    Thai

    English

Education

    LLM, University of Melbourne Law School

    Graduate Diploma in Public Law, Thammasat University

    LLB, Thammasat University

Insights

January 8, 2026
Doing business in Thailand means operating under a strict regulatory framework. From time to time, companies may receive unexpected administrative orders from government authorities that restrict their operations, impose new compliance obligations, or levy fines and penalties. When this happens, a business may challenge the order under Thailand’s administrative law system. The primary concern in pursuing administrative litigation is timing, as strict statutory deadlines apply and missing them can permanently affect a company’s rights. First Step: Administrative Appeal Many companies assume the first step is to immediately bring the matter before the Administrative Court to seek revocation or suspension of the order. Some even attempt to request an interim injunction to stop the order from taking effect. However, Thai law generally requires that the company first challenge the order through an administrative appeal with the same agency that issued it. Only after this process is complete can the matter be taken to court. Seeking an interim injunction at this stage is also not possible. This is because Thai law does not allow a standalone application for an interim injunction; an injunction can only be requested together with the underlying complaint filed with the Administrative Court. Since a court complaint cannot be filed until the administrative appeal process has been exhausted, an injunction is usually not available at the early stage. What Are the Timeframes for Administrative Appeal? Thailand applies a two-stage administrative appeal process. The appeal must first be submitted to the same authority that issued the order, which will review its own decision. If that authority affirms its decision, the appeal is then escalated to the relevant higher authority for further review. In most cases, both stages must be completed before a company is allowed to proceed to court. The timeframe for filing an administrative appeal is very
August 21, 2025
Tilleke & Gibbins is pleased to announce that the firm has adopted Harvey, a leading enterprise-grade AI platform for the global legal industry. The firm is proceeding with a rollout of Harvey’s legal AI solutions, which are supported by robust security and confidentiality protections, across the firm’s full-service regional practice in Southeast Asia. This initiative builds on the firm’s recent deployment of Microsoft Copilot and represents another advancement in Tilleke & Gibbins’ commitment to leveraging technology for enhanced legal service delivery. Under the program, legal professionals across the firm’s offices in Cambodia, Indonesia, Laos, Myanmar, Thailand, and Vietnam will have access to the full Harvey platform, equipping them to deliver practical, impactful, and results-driven legal services for clients throughout the region. The firm will also develop bespoke agentic workflows within Harvey tailored to the firm’s core practices and the unique requirements of Southeast Asian legal markets. Commenting on the initiative, Managing Partner Tiziana Sucharitkul stated, “At Tilleke & Gibbins, we have consistently invested in developing and adopting technology to improve the speed, precision, and overall excellence of our legal services. The firm’s decision to invest in Harvey exemplifies our commitment to innovation, further differentiating Tilleke & Gibbins within Southeast Asia’s legal landscape.” Managing Partner Darani Vachanavuttivong remarked, “By combining the deep regional expertise of our lawyers with Harvey’s market-leading domain-specific AI, we are empowering our regional team to streamline drafting, research, and review processes for complex legal matters, all while maintaining the high standards of quality and security our clients expect from us.” Harvey’s Chief Business Officer John Haddock added, “It’s clear Tilleke & Gibbins is investing heavily in innovation, and it’s clear their global clients will benefit significantly from their focus and investment. The Harvey team is thrilled to support the firm’s journey with our platform.”
May 2, 2025
Attorneys from Tilleke & Gibbins have updated the latest edition of Doing Business in Thailand, a Q&A-style guide from Thomson Reuters Practical Law that offers an overview of key legal considerations for companies operating in jurisdictions worldwide. The contribution outlines the country’s legal and regulatory framework for foreign investment and business operations and reflects the latest legislative developments. The chapter addresses the following core topics: Legal system: Structure of the courts and the codified nature of Thai law. Foreign investment: Business restrictions under the Foreign Business Act, sector-specific regulations, exchange control rules, and investment incentives. Business vehicles: Overview of partnerships, private and public limited companies, and other legal entities. Employment: Labor protections, employment contracts, foreign worker requirements, and termination procedures. Tax: Corporate and personal income tax, indirect taxes, and tax obligations for residents and non-residents. Intellectual property: Registration and enforcement of patents, trademarks, designs, and copyrights. Data protection: Key provisions of the Personal Data Protection Act and related compliance obligations. Competition law: Regulatory framework under the Trade Competition Act. Anti-bribery and corruption: Relevant legislation and enforcement mechanisms. E-commerce and digital business: Legal regime for online transactions and digital platforms. Marketing and advertising: Consumer protection laws and regulations affecting advertising and marketing practices. Product regulation and liability: Safety standards, liability regimes, and roles of enforcement authorities. Practical Law, a legal reference resource from Thomson Reuters, publishes a range of guides for hundreds of jurisdictions and practice areas. The insurance and reinsurance guide is a valuable resource for legal practitioners, covering numerous jurisdictions worldwide. To view the latest version of the guide, please visit the Practical Law website and enroll in the free Practical Law trial to gain full access.
March 17, 2025
Tilleke & Gibbins has contributed the Cambodia, Myanmar, Thailand, and Vietnam chapters to Data Protection and Cybersecurity Regulation in Southeast Asia, a wide-ranging guide published by Drew Network Asia (DNA). The resource provides a comprehensive overview of data protection and cybersecurity laws across the region, offering practical insight into compliance requirements and regulatory developments affecting organizations that handle personal data or operate digital services in Southeast Asia. The guide begins with a regional overview, including the broader ASEAN context and cooperation initiatives. Jurisdiction-specific chapters follow a consistent structure—covering data privacy and governance obligations, security requirements and breach notification, outsourcing and cross-border data transfers, and broader accountability and compliance measures. This format allows readers to compare regulatory approaches across markets such as Brunei, Indonesia, Malaysia, the Philippines, Singapore, and others. In addition to the country chapters, the publication addresses cybersecurity and privacy engineering challenges, providing guidance for organizations and outlining obligations applicable to data controllers, processors, and intermediaries. A dedicated section on data breach management across ASEAN examines notification requirements, response considerations, and practical steps for managing incidents in a regional or global context. The guide is intended to serve as a practical reference, and the authors note that specific legal requirements may vary depending on sector, processing activity, or evolving legislation. Readers seeking more detailed advice can contact the practitioners listed in each chapter. The full guide is available for download using the button below or directly from the DNA website.

Awards & Rankings

May 11, 2026
Tilleke & Gibbins has continued to show excellent performance in the recently released Benchmark Litigation 2026 rankings for dispute resolution firms in the Asia-Pacific region. The rankings include two jurisdictions where Tilleke & Gibbins is active: Thailand and Vietnam. Firm Rankings A full summary of the firm’s rankings is provided below: Thailand Commercial & Transactions – Tier 1 Government & Regulatory – Tier 1 Labor & Employment – Tier 1 Intellectual Property – Tier 1 Trade & Customs – Tier 2 Vietnam Commercial & Transactions (Foreign Firms) – Tier 1 Intellectual Property (Foreign Firms) – Tier 1 Labor & Employment (International Firms) – Highly Recommended (top tier awarded in this category) White Collar Crime – Recommended (top tier awarded in this category) Energy & Construction (Foreign Firms) – Tier 2 International Arbitration – Tier 2 Individual Rankings The 2026 edition also recognizes 12 Tilleke & Gibbins lawyers in Thailand—more than any other firm in the jurisdiction—and four in Vietnam. Thailand Alongkorn Tongmee – Trade & Customs Chitchai Punsan – Commercial & Transactions Chusert Supasitthumrong – Labor & Employment John Frangos – Commercial & Transactions Noppramart Thammateeradaycho – Shipping Nuttaphol Arammuang – Intellectual Property Piyawat Vitooraporn – Commercial & Transactions Pongpalin Chantrapirom – Commercial & Transactions Suebsiri Taweepon – Intellectual Property Suruswadee Jaimsuwan – Commercial & Transactions Thawat Damsa-ard – Commercial & Transactions Tiziana Sucharitkul – Commercial & Transactions, Government & Regulatory Vietnam Duc Anh Tran – Commercial & Transactions Linh Duy Mai – Intellectual Property Loc Xuan Le – Intellectual Property Tu Anh Tran – Commercial & Transactions Benchmark Litigation’s annual research is based on interviews with dispute resolution specialists and clients, as well as analysis of recent casework and market developments. To view the full results, please visit the Benchmark Litigation websites for Thailand and Vietnam.

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