Firm Profile > Siam Premier International Law Office Limited > Bangkok, Thailand

Siam Premier International Law Office Limited

Thailand > Corporate and M&A Tier 2

Siam Premier International Law Office Limited handle the full life cycle of corporate and M&A work, advising a range of clients domestically and internationally on public and private sector transactions. Chatchavej Chitvarakorn acts for foreign insurers and insurance companies in relation to corporate restructuring. Linda Osathaworanan is an expert on corporate finance and foreign investments matters while Bancha Wudhiprecha is noted for his experience in domestic and trans-national commercial transactions and M&A.

Key clients

Prudential PLC

FamilyMart Co., Ltd

Minor International Public Company Limited

Wallenius Wilhelmsen Solutions

Visy Singapore Investments Pte Ltd.

Tipco Asphalt Public Company Limited

Ikano (Thailand) Limited (IKEA)

Kin Dee Yu Dee 2020 Co., Ltd.

Ubon Bio Ethanol Public Company Limited

Bio Genetech International Co., Ltd.

Thailand > Dispute resolution Tier 2

Siam Premier International Law Office Limited advises Thai and foreign companies on an extensive range of disputes.  Techatat Udomsiri is experienced in disputes involving employment, intellectual property and administrative proceedings. Kong Suriyamontol is a commercial litigator who acts for domestic and international clients while Bancha Wudhiprecha  handles cases of antitrust investigations and proceedings, and contractual disputes with aircraft parts manufacturers. Prominent on administrative disputes is partner Sumit Masrungson, with three decades of practice acting for public and private sector clients.

Thailand > Labour and employment Tier 2

Siam Premier International Law Office Limited's 'advice on labour dispute settlement is clear and practical.' The firm acts for Thai and foreign clients on the full remit of contentious and non-contentious labour and employment matters. Rawat Chomsri's clients include multinational corporations and domestic companies for whom he acts on contentious and non-contentious matters. He also advises on industrial relations. Sumit Masrungson is sought out for his expertise and experience of employment law disputes.  

Practice head(s):


‘Advice given on labour dispute settlement is quite clear and practical.’

Thailand > Real estate and construction Tier 2

Siam Premier International Law Office Limited is present on a broad range of work including industrial, residential, healthcare, retail and hotel development projects. Chatchavej Chitvarakorn represents government agencies as well as multinational corporations on construction projects and foreign investment into Thailand. Praphan Phichaiwatkomol co-leads the team with Torsakul Cunvong who advises banks on financing projects. Associate Ajjima Kanokmaneechotikul works on the development of resorts, hotels and mixed-use properties.

Other key lawyers:


‘This practice is friendly and provides good services and response time.’

‘Chatchavej Chitvarakorn and Ajjima Kanokmaneechotikul are responsive and commercial-minded. Ajjima is thorough in her work.’


Key clients

The Port Authority of Thailand

WeWork (Thailand) Co., Ltd.

Tipco Tower Co., Ltd.

Thailand > Banking and finance Tier 3

Siam Premier International Law Office Limited advises commercial and development banks as well as financial institutions on matters such as asset, aviation, and bond finance, often on a cross-border basis. Suttiphat Khamsirivatchara co-leads the team; he is an expert in bank lending and extensions of credit and advises on project and structured finance. Nithi Soomswasdi advises on financial institutions regulations and is noted for work on domestic and cross-border lending.

Key clients

Krungthai Card PCL

Central Plaza Hotel PCL

Home Product Center PCL

Ayudhya Capital Auto Lease PLC

Fasanara Capital

Ardex GmbH and Ardex Singapore Pte Ltd

Triple i Logistics Public Company Limited

Deutsche Bank AG

Thailand > Capital markets Tier 3

Siam Premier International Law Office Limited's capital markets practice covers matters such as derivatives, financial regulation as well as IPOs and secondary offerings. Kulkanist Khamsirivatchara; Linda Osathaworanan are jointly leading the team. Together they provide expertise in securities and stock exchange laws and private company to public company conversion.  

Key clients

Nutrition Sc Company Limited

Cube Real Property Co., Ltd

Haadthip Public Company Limited

Kang Yong Electric Public Company Limited

Thailand > Projects and energy Tier 3

Siam Premier International Law Office Limited's team acts for its clients on consortium and joint venture agreements, and disputes arising out of projects and project financing for regional energy projects. Rawat Chomsri co-heads the practice. He is active on contentious and non-contentious energy matters in Thailand and Laos while co head Chatchavej Chitvarakorn has experience of infrastructure and construction matters.

Key clients

The Port Authority of Thailand

Chevron (Thailand) Limited

Electricity Generating Authority Thailand

Irradiance Solar Co., Ltd.

Amata Corporation Public Company Limited

Tipco Asphalt Public Company Limited

Thailand > Tax Tier 3

Siam Premier International Law Office Limited advise on the Thai tax law aspects of investment structuring and M&A as well as corporate transactions. The practice also undertakes tax litigation. Praphan Phichaiwatkomol heads up the team and provides deep tax expertise with experience of international tax planning and tax efficient investment structures. Associate Keerada Rungtanakiat is notable for work on the issues arising out of inbound and outbound investments.

Practice head(s):

Other key lawyers:

Siam Premier is a leading independent Thai law firm, advising foreign and local clients on the full spectrum of domestic and cross-border corporate transactions, major projects, regulatory matters and disputes in Thailand.

Established in 1990, we have a strong history of providing pragmatic and innovative solutions to our clients’ legal challenges, enabling our clients to unlock opportunities and achieve commercial outcomes.

Our relationship-focused approach includes working closely with our clients to understand their needs, challenges and business objectives, while closely monitoring local legal developments. This approach, coupled with our deep sector experience, enables us to deliver solutions designed to give our clients the commercial edge.

We frequently work with leading law firms from across the globe on cross-border and multi-jurisdictional transactions and disputes, where we add value by understanding the nuances of local challenges, navigating complex regulatory frameworks, and providing valuable insight into the local business and legal environment in Thailand.

Driven by our clients’ needs in an ever-changing landscape, our forward thinking and diverse team of lawyers are dedicated to delivering exceptional outcomes for our clients, wherever their businesses take them.

Department Name Email Telephone
Managing Partner Phisud Dejakaisaya +6626461888
Partner Apichart Chirabandhu +6626461888
Corporate Commercial Bancha Wudhiprecha +6626461888
Corporate/M&A, Antitrust and Competition, Foreign Direct Investment, Insurance, Projects & Energy, PPPs, Real Property & Construction, Litigation & Dispute Resolution Chatchavej Chitvarakorn +6626461888
Corporate/M&A, Foreign Direct Investment, Capital Markets, Banking and Finance, Antitrust and Competition Kanokon Worachanyawong +6626461888
Litigation and Dispute Resolution Kong Suriyamontol +6626461888
M&A, Capital Markets, Securities Regulations, Public Company and Corporate, Foreign Investment, Litigation Strategy Kulkanist Khamsirivatchara +6626461888
Corporate/M&A, Foreign Direct Investment, Capital Markets Linda Osathaworanan +6626461888
Banking & Finance, Debt Restructure, Mergers & Acquisitions Nithi Soomswasdi +6626461888
Banking & Finance, Corporate Commercial, Capital Markets, Foreign Direct Investment, Restructuring & Insolvency, Projects & Energy, Real Property & Construction Phasunsook Ayanaputra +6626461888
Taxation, Foreign Investment, Mergers & Acquisitions, Commercial, Corporate, Property Praphan Phichaiwatkomol +6626461888
Capital Markets, Corporate/M&A, Employment & Labour, Foreign Direct Investment, Litigation & Dispute Resolution Rawat Chomsri +6626461888
Corporate/M&A, Commercial, Capital Markets Saithip Mansri +6626461888
Corporate / M&A, Commercial, Banking & Finance Siripun Kriangwattanapong +6626461888
Capital Markets, Corporate / M&A, EPC & Project Finance, Energy, Real Estate, Foreign Investment Suttiphat Khamsirivatchara +6626461888
Litgation and Dispute Resolution Techatat Udomsiri +6626461888
Banking & Finance, Corporate Commercial Torsakul Cunvong +6626461888
Senior Consultant: Corporate Commercial, Foreign Direct Investment, Capital Markets, Real Property & Construction, Employment & Labour Piyamarn Pongtornpipat +6626461888
Senior Consultant: Litgation and Dispute Resolution, Labour & Employment Sumit Masrungson +6626461888
Senior Consultant: Dispute Resolution Suthee Dumnuadee +6626461888
Special Counsel: Litigation and Dispute Resolution Chakrapong Boonchan +6626461888
Special Counsel: Litigation and Dispute Resolution Kasem Pumpuang +6626461888
Special Counsel: Real Property Sawat Sangkavisit +6626461888
Special Counsel: Litgation and Dispute Resolution, Labour & Employment Somchai Yungkarn +6626461888
Photo Name Position Profile
Mr Phasunsook Ayanaputra  photo Mr Phasunsook Ayanaputra Banking & Finance, Corporate Commercial, Capital Markets, Foreign Direct Investment, Restructuring &…
Mr Chakrapong Boonchan  photo Mr Chakrapong Boonchan Special Counsel
Mr Apichart Chirabandhu  photo Mr Apichart Chirabandhu Deputy Chairman
Mr Chatchavej Chitvarakorn  photo Mr Chatchavej Chitvarakorn Managing Partner
Mr Rawat Chomsri photo Mr Rawat Chomsri Partner
Mr Torsakul Cunvong  photo Mr Torsakul Cunvong Partner
Mr Phisud Dejakaisaya photo Mr Phisud Dejakaisaya Founding Partner
Mrs Kulkanist Khamsirivatchara photo Mrs Kulkanist Khamsirivatchara Partner
Mr Suttiphat Khamsirivatchara  photo Mr Suttiphat Khamsirivatchara Partner
Ms Siripun Kriangwattanapong  photo Ms Siripun Kriangwattanapong Partner
Ms Saithip Mansri  photo Ms Saithip Mansri Partner
Mr Sumit Masrungson photo Mr Sumit Masrungson Senior Consultant
Ms Linda Osathaworanan  photo Ms Linda Osathaworanan Partner
Mr Praphan Phichaiwatkomol  photo Mr Praphan Phichaiwatkomol Partner
Ms Piyamarn Pongtornpipat  photo Ms Piyamarn Pongtornpipat Senior Consultant
Mr Kasem Pumpuang  photo Mr Kasem Pumpuang Special Counsel
Mr Sawat Sangkavisit  photo Mr Sawat Sangkavisit Special Counsel
Prof Dr Surakiart Sathirathai  photo Prof Dr Surakiart Sathirathai Chairman of the Board of Directors, Siam Premier International Law Office Ltd.…
Mr Nithi Soomswasdi  photo Mr Nithi Soomswasdi Partner
Mr Kong Suriyamontol  photo Mr Kong Suriyamontol Partner
Mr Techatat Udomsiri  photo Mr Techatat Udomsiri Partner
Ms Kanokon Worachanyawong  photo Ms Kanokon Worachanyawong Partner
Mr Bancha Wudhiprecha  photo Mr Bancha Wudhiprecha Partner
Mr Somchai Yungkarn  photo Mr Somchai Yungkarn Special Counsel
Number of lawyers : 90+
Singapore-Thai Chamber of Commerce (STCC)
The Australian-Thai Chamber of Commerce


Siam Premier International Law Office Limited, one of Thailand’s leading independent law firms, today announces the appointment of Chatchavej Chitvarakorn as its new Managing Partner, effective 1 October 2020. Chatchavej succeeds Phisud Dejakaisaya — one of the firm’s founding partners — after 30 years at the helm.