International Arbitration 2026

THAILAND Law and Practice Contributed by: Phatsawat Siwawej, Piyachon Jiraratmethakorn and Ketsirin Wisetwatcharawong, Weerawong C&P

Weerawong C&P is a leading independent Thai law firm providing comprehensive legal services to do - mestic and international clients across a broad range of industries. The firm’s dispute resolution team ad - vises and represents clients in complex commercial disputes before Thai courts and in domestic and in - ternational arbitration. Mr Phatsawat and his team have extensive experience acting as counsel in arbi - trations administered under the rules of leading insti - tutions, including the ICC, SIAC, HKIAC, LCIA, Thai -

land Arbitration Institute (TAI) and Thailand Arbitration Center (THAC), as well as in ad hoc proceedings. The practice covers a wide range of sectors, including en - ergy, infrastructure, construction, financial services, manufacturing and technology, and regularly advises on arbitration agreements, enforcement of arbitral awards and cross-border dispute strategy. The firm is consistently recognised by leading international legal directories for its dispute resolution and arbitra - tion expertise.

Authors

Phatsawat Siwawej is a partner in the dispute resolution practice group at Weerawong, Chinnavat & Partners Ltd. He represents leading Thai and international clients in complex commercial litigation and arbitration,

Ketsirin Wisetwatcharawong is an associate in the dispute resolution practice group at Weerawong C&P. She advises and represents clients in commercial disputes, arbitration and white-collar crime matters, with

pre-litigation matters, joint venture disputes, franchise disputes, construction, energy, class actions, real estate, digital assets and environmental disputes. He also lectures at leading law schools and regularly publishes on arbitration and ADR across Asia. He is recognised as an “Up and Coming” lawyer by Chambers and Partners, among other leading law directories.

experience in both domestic and cross-border cases. She also has experience in infrastructure and public-private partnership matters. She holds an LLB (first-class honours) from Chulalongkorn University and is admitted as a Thai barrister-at-law and a notarial services attorney.

Piyachon Jiraratmethakorn is an associate in the dispute resolution practice group at Weerawong C&P. He advises and represents clients in

both domestic and cross-border arbitration and dispute resolution matters, and provides legal opinions across a wide range of issues. His expertise spans civil and criminal litigation, consumer protection, employment law, intellectual property, bankruptcy and business rehabilitation. He holds an LLB (first-class honours) from Chulalongkorn University and an LLM (distinction) from the University of Glasgow, UK. Piyachon is a Thai barrister-at-law and a notarial services attorney.

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