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Chusert Supasitthumrong

Partner and Director, Dispute Resolution

Biography

Chusert Supasitthumrong, partner and director of Tilleke & Gibbins’ dispute resolution and litigation group, is a trial and appellate lawyer with an extensive track record of helping clients achieve successful outcomes in the Thai court system. With unmatched expertise and qualifications in labor and employment dispute resolution, Chusert is recognized as the go-to lawyer for Thailand’s largest employers for his ability to help clients solve critical employment disputes, from labor strikes to layoffs to contested for-cause terminations.

A formidable advocate with extensive experience litigating complex matters before the Labor Court and the Supreme Court, Chusert is equally successful in securing favorable settlements and contract terms for his clients. His labor practice includes advising clients in multiple-party labor disputes and collective bargaining negotiations. Chusert is one of just a handful of private practice lawyers in Thailand licensed as a Labor Relations Advisor with Thailand’s Ministry of Labor, which enables him to engage directly with labor unions in negotiations on behalf of corporate clients.

Chusert also handles commercial disputes related to product liability, customs, maritime, international trade, company reorganizations, tax, and white-collar crime, and in his role as director of the firm’s dispute resolution and litigation department provides guidance to teams working on contentious matters across virtually every practice area.

He is a regular speaker on these topics as well, presenting at regional legal conferences, for corporate clients at in-house seminars, and on televised programs. He is also a frequent contributor to the Bangkok Post and other leading periodicals.

Chusert was the exclusive winner for Thailand of the International Law Office Client Choice Award 2019 for Employment and Labor, and he is ranked by leading legal directories including Benchmark Litigation, Chambers Asia-Pacific, The Legal 500 Asia Pacific, and Asialaw Profiles.

Experience

  • Planned and executed the layoff of 1,900 employees. Thereafter, 279 of the affected employees submitted claims against the client in the total amount of THB 300,000,000. We successfully proved that our client had cause to terminate its employees and that such was done fully within applicable Thai law, resulting in judgment in our client’s favor. This was a high-stakes matter because, if we had lost the labor cases, the approximately 1,600 additional employees would have filed claims totaling approximately THB 2,000,000,000. We also act as ongoing labor compliance counsel.
  • Prevailed in a highly publicized termination case wherein the client sought court permission to terminate the president of a labor union based on her television appearance while wearing a controversial T-shirt. The president maintained that she had given such interview on her own time and that her actions were protected by the Constitution. Although she was supported by many NGOs, the court ruled in favor of our client.
  • Negotiated a favorable settlement of a highly contested termination of a company director involving our client, the director, and the company of the spouse of the director. The dispute included two criminal cases and two civil cases (one of which involved a claim of THB 20,000,000). We successfully gathered evidence of the director’s misconduct and leveraged that evidence to secure a favorable settlement for our client.
  • Planned the layoff of approximately 1,000 persons and created a multifaceted strategy to manage the response of the employees and the labor union. The labor union mounted a strong challenge to our client’s activities. Nonetheless, we successfully responded to the opposition and completed the downsizing of the company without any employee claim.
  • Helped a manufacturer respond to the creation of a labor union and the lodging of a labor demand. We advised the client and created a plan of action for managing all issues. Ultimately, the employees stopped the process of the labor demand and withdrew the application for registration of the labor union.
  • Represented a manufacturer in negotiations with a labor union on strike. We successfully negotiated the terms of a collective bargaining agreement (CBA) and, thus, expedited the conclusion of the strike. In the CBA, we secured favorable terms for our client and the return of certain management rights.
  • Defended a leading apparel company in a THB 50,000,000 labor claim and in a criminal case brought against the client’s director. We prevailed in both claims brought by the client’s former HR manager.
  • Represented a well-known Japanese manufacturer in the prosecution of both civil and criminal matters related to use of confidential trade secret and theft of client property. Our client reached a favorable settlement in the civil claims. In the criminal matter, we worked with the police and the public prosecutor and successfully secured sufficient evidence to support prosecution of the criminal claims.
  • Represented one of the world’s most recognizable fashion and luxury goods retailers in several commercial real estate disputes in Thailand arising from the disputed termination of a 30-year franchisee relationship. This representation includes negotiation and settlement of lease hold and commercial franchisee contracts with both the outgoing franchisee and the incoming franchisee partner, one of Southeast Asia’s largest and most successful commercial retailers.
  • Represented the precious metals division of a large Japanese multinational corporation in claims it filed against its shipper and freight forwarder for the loss of gold dram.
  • Consulted on union negotiations, process and procedures under Thai law, and applicable standards and contract terms.
  • Advised a large American supplier and manufacturer of semiconductors on employment issues for its Thai subsidiaries arising from flooding. More specifically, this dealt with restructuring employment, outsourcing arrangements, recovery planning as floodwaters receded, and laying off over 1,600 employees.
  • Defended a multinational manufacturing company and its subsidiary in unfair termination lawsuits (after operations were withdrawn from Thailand following the 2011 floods) by 100 former employees. The plaintiffs’ claims total USD 17.6 million in damages.
  • Successfully represented global automobile manufacturers and other large multinational companies in high-value product liability cases.
  • Successfully represented numerous global manufacturers in customs cases.
ABOUT Chusert

Location

Languages

    Thai

    English

Education

    LLB, Chulalongkorn University

Insights

June 29, 2026
Thailand’s cabinet has approved the draft Act on Liability for Defective Goods, commonly called Thailand’s “Lemon Law.” The Draft Act is currently pending consideration by Parliament. The draft law aims to strengthen buyers’ position in pursuing cases against sellers. While the Civil and Commercial Code offers provisions governing liability for defective goods, it is difficult in practice for buyers to successfully make a claim against sellers, particularly where defects are latent and not discoverable at the time of sale or delivery. By introducing product-specific rules and clearer remedies, the new law is intended to modernize Thailand’s consumer protection framework and align it more closely with international standards, and to help relieve the buyer’s burden of proof against the seller in product liability cases. If enacted, the draft act will take effect 180 days after publication in the Government Gazette, giving businesses a transition period to assess their compliance obligations. This article provides an overview of the key provisions of the draft act and highlights some practical considerations for businesses operating in Thailand. Scope and Key Definitions The draft act applies to sellers—defined as persons who sell goods in the ordinary course of business—and protects buyers, a term defined broadly to include not just the original purchaser but also transferees and successors in title. This expands the class of people who can bring claims. The law does not apply to used goods, live animals, or goods exempted by future ministerial regulation. It also leaves intact any separate warranties, promises, advertisements, or other guarantees a seller has given; those remain enforceable alongside the new statutory rights. General Liability for Defective Goods Sellers are liable for defects that exist at the time of delivery, regardless of whether the seller knew about them. Liability arises where a defect reduces: The benefit intended under
June 16, 2026
The president of Thailand’s Supreme Court has issued new recommendations providing courts with criminal jurisdiction with a comprehensive framework for identifying and dismissing criminal cases brought in bad faith. Published in the Government Gazette on May 29, 2026, after being signed on May 25, the Recommendations of the President of the Supreme Court Concerning Bad-Faith Litigation in Criminal Cases B.E. 2569 were issued under Section 5 of the Act on the Organization of Courts of Justice. The recommendations took effect upon publication and represent a significant step in Thailand’s efforts to curb abusive criminal litigation, including strategic lawsuits against public participation (SLAPP). Background Section 161/1 of Thailand’s Criminal Procedure Code empowers courts to dismiss criminal cases filed dishonestly or with the intent to harass or take unfair advantage of a defendant. The new recommendations provide detailed guidance that courts previously lacked on identifying and handling such prosecutions. Definition of Bad-Faith Litigation Under recommendation 1, filing a criminal case in bad faith is defined broadly to encompass three categories: Harassment-type filings involving intimidation, threats, or creating unreasonable hardship for the defendant; Coercive filings designed to pressure the defendant into acting or refraining from acting for illegitimate benefit; and False or misleading filings that deliberately assert incorrect material facts or conceal such facts. Circumstances Indicating Bad Faith Recommendation 2 sets out specific circumstances that should raise a court’s suspicion that a filing may violate section 161/1. These include: Filing in a distant court far from the defendant’s domicile without benefiting the adjudication; Retaliation against the defendant’s advocacy for human rights, environmental protection, consumer rights, labor rights, or other public interests—effectively establishing an express anti-SLAPP framework; Retaliation against whistleblowers who disclosed corruption or unlawful conduct; Retaliation against individuals responsible for investigating the plaintiff’s wrongdoing or who concluded such an investigation; Filing multiple
March 9, 2026
Over the past several years, numerous automobile manufacturers have brought electric vehicles (EVs) to the market and received positive feedback from consumers in Thailand and around the world. EVs have gained popularity due to their lower maintenance costs, reduced energy expenses, and environmental benefits. However, reports have emerged of EVs causing problems such as battery fires, autopilot malfunctions leading to accidents, and safety systems such as brakes engaging automatically under inappropriate conditions. Even when these situations do not cause injury to drivers or passengers, they raise significant concerns for EV manufacturers, importers, and sellers operating in Thailand. These problems may seriously impact businesses if the products are identified as unsafe under Thailand’s Product Liability Act (PLA), officially known as the Liability for Damages Arising from Unsafe Products Act. Under this law, authorities or courts can order business operators to recall products from the market or prohibit their export, import, or sale. To manage and mitigate the risk of being found liable for damages due to an unsafe product under the PLA, EV business operators should be aware of the scope of the law. Potentially Liable Parties The PLA identifies several types of entrepreneurs and business operators—both individuals and entities—as “potentially liable parties” (PLPs) who may be held liable under the law. In the EV context, this could include vehicle manufacturers, battery suppliers, software developers whose systems are integrated into the vehicle, and local importers or distributors. Specifically, the PLA covers: Manufacturers or hirers Importers Sellers of goods for which the manufacturer, hirer, or importer cannot be identified Any other party who uses the name, trade name, trademark, or statements associated with the alleged unsafe products, or acts in a manner that causes them to be perceived as a manufacturer, hirer, or importer Definition of “Product” and “Unsafe Product” The
February 20, 2026
Thailand’s Supreme Administrative Court has issued a decisive ruling annulling the Ministry of Labor’s notification that had granted an exemption for foreign pilots to fly domestic routes under wet‑lease arrangements. A wet lease is a leasing arrangement in which the aircraft is provided together with its foreign flight crew, including pilots, and related operational support, rather than the airline supplying its own pilots. The judgment, delivered on November 17, 2025, and published in the Government Gazette on January 30, 2026, follows a legal challenge brought by the Thai Pilots Association, which argued that the exemption unlawfully enabled foreign workers to assume a role traditionally reserved for Thai nationals. The notification in question, dated December 13, 2024, authorized foreign pilots who came as part of wet‑leased aircraft to fly domestic routes. The Thai Pilots Association disputed the legality of this rationale, asserting that the exemption was triggered by a private airline’s request rather than by any statutory necessity. The Ministry of Labor justified this measure by relying on aircraft‑specific approvals issued by the Ministry of Transport and by enabling the Department of Employment to issue corresponding work permits. Arguments Presented in the Case The Thai Pilots Association argued that the exemption undermined the interests of domestic pilots and conflicted with the policy intent of Thailand’s foreign‑worker regulatory framework. The lawsuit emphasized that the notification arose directly from a private airline company’s request to operate two A320 aircraft under a wet lease and that the measure had the practical effect of displacing Thai pilots who remained unemployed. Meanwhile, the Ministry of Labor defended the exemption as a temporary and necessary response to industry shortages and part of national efforts to support tourism and restore aviation capacity. Legal Framework Thai law establishes a general prohibition against foreign nationals piloting domestic aircraft. Section

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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