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SIAM JURIS
A Bangkok-based law firm focused on delivering strategic legal solutions where legal complexity and business realities intersect.
ABOUT THE FIRM
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Senior legal expertise
A team og highly experienced lawyers with decades of practice across complex legal matters and industries.
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Commercial understanding
We combine legal expertise with a strong understanding of business realities and commercial objectives.
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Strategic judgment
We handle high-value and sensitive matters with precision, discretion, and practical judgment.
OUR EXPERTISE
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Our expertise spans real estate development, land acquisition, construction, infrastructure, industrial operations, environmental compliance, data centers, energy projects, and investment structures. We provide strategic and commercially focused legal advice to investors, developers, corporations, financial institutions, and industrial operators across Thailand. We support clients throughout the entire project lifecycle, from planning and acquisition to development, execution, and long-term expansion.
PEOPLE
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Chavalit Uttasart
Managing Director
Chavalit Uttasart is a senior lawyer with more than four decades of experience in dispute resolution, intellectual property, corporate and commercial law. He is widely recognised for his expertise in complex litigation, strategic dispute management, and high-value commercial matters. His practice encompasses a broad range of contentious and advisory work, including civil and administrative litigation, intellectual property enforcement, competition and regulatory matters, corporate restructuring and rehabilitation, foreign investment, mergers and acquisitions, and technology-related legal issues. He also advises clients in regulated sectors, including telecommunications, broadcasting, and digital business. Chavalit has represented both domestic and international clients in significant litigation, arbitration, and rehabilitation proceedings involving substantial commercial interests across a variety of industries, including banking, aviation, retail, energy, logistics, and information technology. Throughout his career, he has held senior leadership positions at leading law firms in Thailand, including serving as Managing and Founding Partner of SCL Law Group and as a Partner at International Legal Counsellors Thailand Ltd. (ILCT). He also served in senior leadership roles at an international law firm affiliated with one of Japan’s leading legal practices. He is recognised by leading legal directories for his work in intellectual property and dispute resolution. Chambers Asia has described him as “highly talented and respected in the IP community,” while Legal 500 Asia Pacific has recognised him for contentious work and leadership in the Thai intellectual property sector.
Punjaporn Kosolkitiwong
Managing Director
Punjaporn Kosolkitiwong is a highly experienced disputes lawyer with more than four decades of practice in litigation and arbitration. She advises and represents clients in a broad range of contentious matters, including civil and criminal litigation, intellectual property disputes, tax disputes, administrative proceedings, restructuring and insolvency, and labor matters. Her practice encompasses complex commercial disputes, cross-border arbitration, regulatory disputes, and high-value litigation across multiple industries. She is widely recognised for her strategic judgment, deep litigation experience, and practical approach to managing sophisticated and sensitive disputes. Punjaporn has acted for major domestic and international clients in precedent-setting cases involving intellectual property, tax, insolvency, corporate disputes, infrastructure projects, and investor claims. Her experience includes appearances before Thai courts, arbitral tribunals, and administrative bodies, as well as matters involving multi-jurisdictional enforcement and regulatory issues. Prior to joining Siam Juris Partners Limited, she served as a litigation partner at one of Thailand’s leading law firms for nearly three decades, where she led complex disputes and advised multinational clients on high-stakes litigation matters. She has also contributed extensively to legal education and law reform initiatives, particularly in the areas of bankruptcy and insolvency law.
Kallayarat Chinsrivongkul
Partner
Kallayarat Chinsrivongkul is one of Thailand's leading patent practitioners, with more than 30 years of expertise in intellectual property law. She advises domestic and international clients on all aspects of patent protection, including patent prosecution, infringement and validity matters, third party observations, restoration of patent rights, patent portfolio management, and intellectual property protection strategies in Thailand and neighboring jurisdictions, particularly Laos and Cambodia. Throughout her distinguished career, Kallayarat has represented multinational corporations, research institutions, and innovative enterprises across a broad range of industries, including pharmaceuticals, biotechnology, medical devices, chemistry, electronics, telecommunications, automobile manufacturing and consumer products. Her extensive experience enables her to provide practical, commercially focused advice on the acquisition, protection, and management of intellectual property assets. Kallayarat is particularly recognized for her expertise in patent prosecution, patent maintenance, and regional patent protection strategies. She regularly advises clients on international filing programs, patentability assessments, and patent protection in Thailand, Laos, and Cambodia.
Malinee Kriengkrailipikorn
Partner
Malinee Kriengkrailipikorn is a corporate and commercial lawyer advising on a range of corporate transactions, investments, and restructuring matters. She brings a strong combination of legal expertise and commercial acumen, supporting clients in navigating strategic decisions, regulatory frameworks, and legal compliance. Her practice includes mergers and acquisitions, asset acquisitions, capital markets transactions (including IPOs), restructuring and insolvency matters, and commercial contract drafting and negotiation. She has advised cross-border sale transactions involving overseas counterparties, including trade arrangements such as letters of credit, guarantees, and marine transportation. She has also participated as part of the legal team in investment-related disputes before Thai courts, contributing to legal analysis and the preparation of claims, witness statements, and defenses, particularly in relation to listed company investments. In addition, she has experience in business rehabilitation and restructuring matters She combines strong legal expertise with practical commercial insight, delivering solutions that are both legally sound and aligned with clients’ business objectives.
Pasayu Israsena Nah Ayudhaya
Partner
Pasayu Israsena Nah Ayudhaya is a disputes lawyer with significant experience in complex, high-value litigation and arbitration. He advises and represents international and Thai clients in commercial, corporate, and criminal matters, with a particular focus on strategically sensitive and high-stakes disputes. His practice covers a broad spectrum of contentious work, including large-scale commercial litigation, shareholder and investment disputes, business rehabilitation proceedings, and white-collar criminal matters. He has acted in cases involving substantial financial exposure, including multi-billion Baht claims, and is known for developing clear, results-oriented strategies in complex and fast-moving situations. Pasayu also has notable experience in arbitration, including representing foreign investors in domestic arbitration and acting as part of the legal team representing the Kingdom of Thailand in investor-State arbitration proceedings. His work frequently involves cross-border elements and coordination with international stakeholders. In addition to his disputes practice, he advises clients on employment-related investigations, misconduct matters, and commercial issues, including contract drafting and risk management.
Wannaporn Siribunjirdsuk
Partner
Wannaporn Siribunjirdsuk is a disputes lawyer with over 20 years of experience in civil and commercial litigation. She advises and represents clients in a wide range of contentious matters, including commercial disputes, labor cases, intellectual property disputes, and tax-related matters. Her practice includes handling high-value civil litigation and criminal cases, as well as providing legal analysis, case strategy, and representation in court proceedings. She also has experience in corporate matters, contract review, and real estate transactions. Wannaporn is known for her strong analytical skills and her ability to provide clear and effective legal support in complex litigation matters.
Chalisa Uttasart
Counsel
Chalisa Uttasart is a Thai-licensed lawyer with experience in business immigration, corporate and commercial matters, legal research, legal translation, and cross-border legal work. She advises and supports international and domestic clients in navigating Thai legal and regulatory requirements, with a particular focus on providing practical and commercially minded solutions. Her experience includes advising and supporting multinational companies and foreign nationals on business immigration and employment-related matters in Thailand. She has extensive experience managing immigration processes, coordinating with relevant government authorities, and assisting clients in navigating complex regulatory requirements. Prior to her business immigration practice, Chalisa gained experience at a Thai law firm supporting both corporate and litigation matters. Her work included assisting with company incorporation and corporate documentation, preparing board of directors' meeting minutes in Thai and English, conducting legal research, and translating legal documents and materials between Thai and English. Chalisa also has experience supporting cross-border legal matters, including translating Thai legal documents and materials into English for use in arbitration proceedings in Singapore. In addition to legal documents, she has translated legal and academic materials concerning Thai law, demonstrating her ability to communicate complex legal concepts accurately and effectively in both Thai and English.
Chanwit Saekow (贺子凡)
Attorney-at-Law
Chanwit Saekow (贺子凡) is a dispute resolution lawyer. His practice focuses on all types of dispute resolution works at both domestic courts and international arbitral institutes. The area of disputes spans from investment dispute, construction, international trade, bankruptcy and restructuring, labor, criminal cases, heritage, administrative cases, etc. Having spent almost a decade studying in Beijing China before pursuing law degrees in Bangkok Thailand, he is not only fluent in both Thai and Chinese but also achieves a thorough understanding of culture in both countries, making a seamless legal service experience possible for clients preferring communication in Chinese.
Kittitach Ritteeverakul
Attorney-at-Law
Kittitach Ritteeverakul is a litigation and dispute resolution lawyer with experience advising and representing domestic and international clients in a broad range of contentious matters. His practice focuses on commercial litigation, arbitration, labor, criminal, and intellectual property disputes, with particular experience in complex commercial and corporate conflicts. He advises clients throughout all stages of dispute resolution, from early case assessment and strategic planning to litigation, arbitration, and enforcement proceedings. His work involves analyzing complex legal and factual issues, formulating dispute strategies, and preparing a broad range of court and arbitration submissions. In addition to his dispute resolution practice, Kittitach advises clients on general commercial matters, employment-related issues, internal investigations, and legal risk management. He is recognized for his analytical approach, attention to detail, and commitment to delivering practical and commercially focused legal advice.
Nattanun Decharit
Attorney-at-Law
Nattanun Decharit is an attorney-at-law whose practice focuses primarily on dispute resolution and litigation. He has experience representing and advising clients in a broad range of disputes before Thai courts, including investment disputes, international trade and commercial disputes, bankruptcy and restructuring, labor disputes, criminal cases, inheritance and estate disputes, administrative cases, and intellectual property disputes. In addition to his dispute resolution practice, Nattanun advises clients on a variety of corporate and commercial matters, including the drafting, review, and negotiation of commercial agreements and other business-related legal matters. His practice also covers intellectual property matters and real estate transactions, including land-related registrations and proceedings before relevant government authorities. Nattanun is fluent in Thai and English, enabling him to effectively advise and communicate with both domestic and international clients across contentious and non-contentious matters.
Sirawit Singharaj
Attorney-at-Law
Sirawit Singharaj is a litigation lawyer with extensive experience in high-stakes dispute resolution, complex arbitration, and white-collar criminal matters. He advises and represents both international and domestic clients, with a particular focus on strategically sensitive, high-value commercial disputes and construction-related litigation. His practice covers a broad spectrum of contentious work, including large-scale arbitration, shareholder and joint venture disputes, and complex enforcement proceedings. He has successfully represented clients in matters involving significant financial exposure, including multi-billion Baht claims, and is adept at developing results-oriented defense strategies in fast-moving, high-pressure environments. Beyond his litigation practice, Sirawit provides comprehensive legal counsel on corporate and commercial issues, including contract negotiation, risk management, and regulatory compliance.
Thawan Suprom
Attorney-at-Law
Thawan Suprom is a disputes lawyer with over 25 years of litigation experience. He advises and represents clients in administrative, corruption and misconduct, family and inheritance, commercial, labor, civil, and criminal matters. His practice covers high-value disputes, legal analysis, case strategy, court representation, and enforcement proceedings. He is recognized for clear, practical advice and a strategic approach to complex litigation.
WHY SIAM JURIS PARTNERS
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Senior experience
We are engaged in high-value and sensitive matters where clarity, and experience are essential.
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Strategic approach
We focus on practical, outcome-driven solutions that align legal strategy with business objectives.
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Trusted in complex matters
Our team includes highly experienced lawyer with decades of practice, bringing depth and judgment to every matter.
NEWS
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