Mr Techatat Udomsiri > Siam Premier International Law Office Limited > Bangkok, Thailand > Lawyer Profile

Siam Premier International Law Office Limited
Techatat Udomsiri photo

Work Department

Partner – LLB (1st Class Honours), Barrister-at-Law, MBA


Specialises in: Litigation & Dispute Resolution


As a partner of Siam Premier, Techatat Udomsiri’s special area of practice is litigation & dispute resolution. He practices in various areas of civil and commercial litigation, criminal law, labour relations litigation, bankruptcy and arbitration. Techatat’s work in the past and present for leading international and Thai banks such as Bank of America, European Asian Bank, Bangkok Bank, Banque Paribas, United Overseas Bank (UOB), Overseas Union Bank (OUB), Sumitomo and Sakura Bank, Oversea Chinese Banking Corporation (OCBC) and International Finance Corporation (IFC) of World Bank, includes acting in debt recovery claims under loan and security documents and restructuring and insolvency cases. Techatat has also acted for companies including Siam Cement Group, Harrods, Seiko and Planet Hollywood in intellectual property claims and dispute resolution procedures. He also has extensive experience in international trade disputes and contractual claims by representing Mitsui & Co., Mitsui (Thailand) Co., Ltd., Banpu Plc., Asia Partnership Fund, Caltex Oil (Thailand) Ltd., Asia Pacific Breweries Singapore Pte Ltd., etc., arbitration proceedings and enforcements by representing Thai Plastic and Chemicals Plc. (TPC), labour disputes by representing Qantas Airways, Dusit Thani Hotel, Amway (Thailand), Dao Chemical (Thailand), etc. Recently Techatat has been involved in representing Mitsubishi Electric Corp. in litigation surrounding breach of contract during the construction of Blueline Underground. Regarding the criminal cases, he has handled various cases for many local and foreign clients (natural and juristic persons).


He was admitted as a Barrister-at-Law in 1979 and is a member of the Thai Bar Association and the Lawyers Council of Thailand.

Lawyer Rankings

Thailand > Dispute resolution

Siam Premier International Law Office Limited has notable experience in representing Thai and foreign corporations at every level of Thai court, and also in proceedings at the Thai Arbitration Institute. Techatat Udomsiri has handled commercial and employment disputes as well as administrative proceedings; Kong Suriyamontol has particular expertise in mining and natural resources disputes; and senior consultant Sumit Masrungson has decades of experience acting for public and private sector clients in commercial and administrative disputes.