Watson Farley & Williams (Thailand) Limited

Ratthakarn Boonnua

Ratthakarn has served as lead trial lawyer in high profile multi-jurisdictional cases for the past 25 years. He specialises in international trade, commercial disputes, business crime, arbitration and employment law. He has vast experience in the energy, maritime and insurance sectors and has acted as a legal expert witness in many international arbitrations, and English, Singapore and Hong Kong High Court cases. Ratthakarn also has extensive experience in acting for major clients in proceedings under a number of arbitration rules including the ICC, SIAC, KCAB, TAI, THAC, OIC and ad hoc arbitrations under UNCITRAL rules. Ratthakarn is fluent in Thai and English.

Steven Burkill

Steven specialises in complex international disputes, in particular, London and Asia-based arbitrations involving oil and gas, power, mining and commodities and large-scale projects. He is also highly experienced in shipping litigation. Steven has sat as an arbitrator in ICC, SIAC, TAI and ad hoc arbitrations. He has used this know-how on commercial projects to help avoid disputes and manage risk.

Kunadha Gajaseni

Kunadha’s experience ranges from international arbitration under the UNCITRAL, ICC, SIAC, LCIA, HKIAC, TAI and KCAB rules and those administered by the PCA and Thai court litigation. His areas of legal work also include commercial, infrastructure, construction, transportation advisory and disputes, in particular in the Energy and Oil & Gas industry. Kunadha is a dual-qualified lawyer. He has been admitted in Thailand since 2012 and in England and Wales (as a Solicitor of the Senior Courts of England and Wales) since 2019. Kunadha is also a certified Thai Notarial Services Attorney and a ICC Young Arbitration and ADR Forum (YAAF) Representative for South Asia 2024-2026 Mandate.

Sonya Kalnin

Dual qualified in England & Wales and Ontario, Canada, Sonya is a seasoned legal expert known for delivering impactful results across diverse legal landscapes. With over two decades of experience, she is a trusted advisor to start-ups, multinational corporations, financial institutions, state-owned enterprises and private equity clients, guiding them through complex global transactions, including mergers and acquisitions, joint ventures, private equity, project finance, strategic alliances, corporate governance and regulatory and compliance matters, including ESG. Recognised for her strategic insight and dedication to client service, Sonya has built a reputation for excellence particularly in the energy and infrastructure sectors across Asia and internationally. Her deep industry knowledge and innovative, pragmatic, and commercially minded legal advice make her a leader in her field.

Piyanuj (Lui) Ratprasatporn

Lui advises domestic and international clients on investing and conducting business in Thailand. She is a specialist in compliance and legal requirements in relation to corporate and commercial operations and foreign direct investment in Thailand. She advises on investment regulations, ownership structure, necessary and applicable licenses, corporate M&A contracts, establishment of legal entities, commercial contracts, licenses and permits and immigration and work permit related matters.

Rachapol Sirikulchit

Rachapol Sirikulchit is a highly experienced litigator with a strong track record in both Thai court proceedings and international arbitration under ICC, SIAC, LCIA and TAI rules. He acts for leading Thai corporates, multinational conglomerates, and high‑net‑worth individuals in complex, high‑value disputes across a broad range of sectors. His recent dispute work spans luxury hotel and residential construction project, waste‑to‑energy power plants, pyrolysis facilities, gas pipeline drilling, upstream gas platform operations, joint ventures and shareholders’ agreements, hotel management, white collar crime, medical malpractice, terminal bulk storage, product liability, unfair dismissal of senior executives, and commercial liability claims. He is listed on the panel of TAI arbitrators and is also an associate member of the Chartered Institute of Arbitrators.

Kay Kian Tan

Kay Kian specialises in the energy, maritime and insurance sectors, where he advises corporates and multi-nationals on international commercial arbitration and litigation. He is a barrister and is admitted as a solicitor in England and Wales and an advocate and solicitor in Singapore. He has worked in London and Singapore and has been based in WFW’s Bangkok office since 2001.