ABOUT P.S.I.L
P.S.I.L. is dedicated to delivering high-quality legal advocacy grounded in integrity, professionalism, and a deep commitment to our clients.
We believe that legal representation is more than a service – it is a responsibility. Our approach is defined by precision, strategic thinking, and a genuine commitment to achieving the best possible outcomes.
Every case we handle is approached with the same level of care, regardless of size or complexity.
years experience
Trusted by international clients
Specialized in Thai immigration & corporate law
Our Services
We provide comprehensive legal and advisory services tailored to the needs of foreign professionals, businesses, and investors operating in Thailand.
With expertise across immigration, labor, corporate, and legal matters, we deliver practical, compliant, and strategically focused solutions.
End-to-end immigration solutions for foreign professionals and businesses.
We assist clients in navigating Thailand’s immigration system with clarity and efficiency, ensuring full compliance at every stage.
Our services include:
-
Visa extensions and renewals (Business, BOI, LTR, Retirement)
-
90-day reporting and re-entry permits
-
Visa conversion and amendments
-
Permanent residence and Thai nationality applications
-
Destination Thailand Visa (DTV) support
-
Outbound visa assistance
-
Preparation and handling of complete visa applications
We also coordinate document certification with relevant authorities and embassies.
-
Work permit and employment compliance services.
We ensure that employers and employees remain fully compliant with Thai labor regulations.
Our services include:
-
Work permit applications (short- and long-term)
-
BOI-related work permits
-
Urgent work permits
-
Renewals and modifications
-
Reporting resignation and cancellations
-
Comprehensive legal support for individuals and businesses.
We provide practical legal solutions across advisory, regulatory, and dispute matters.
Our services include:
-
Notarial services and document certification
-
Legalization through the Ministry of Foreign Affairs
-
Civil and criminal litigation
-
Contract drafting and legal advisory
-
Regulatory and licensing support
-
Corporate structuring and business setup.
We support businesses from establishment through ongoing compliance.
Our services include:
-
Company and partnership registration
-
BOI and IEAT setup
-
Amendments to company structure
-
Business license applications
-
Foreign Business License (FBL) support
-
Protection and enforcement of intellectual property rights.
We help clients secure and protect their intellectual assets in Thailand.
Our services include:
-
Trademark registration
-
Patent filing and enforcement
-
Design registration
-
Copyright protection
-
IP dispute resolution
-
Assisting international clients and businesses across Thailand.
Founder & Managing Partner
Sawitree Rujited
Sawitree Rujited is a Thai legal and immigration professional with more than 20 years of experience advising international businesses, foreign investors, and expatriates on Thai immigration, corporate compliance, and cross-border legal matters.
She graduated with a Bachelor of Laws (LL.B.) from Thammasat University and later qualified as a Barrister-at-Law of Thailand under the Thai Bar. Throughout her career, she has held legal and immigration positions with respected organizations, including Bangkok Bank (BBL), Thanachart/Thanachai Group, and leading international legal and immigration consultancies.
Her practice focuses on Thai visa and work permit solutions, Long-Term Resident (LTR) visas, BOI-related matters, corporate immigration compliance, and legal advisory services for international clients operating in Thailand.
In addition to private practice, she actively contributes to public legal service through the Lawyers Council of Thailand, where she serves as Vice Chairman of the Human Rights Committee and Chair of the Subcommittee on the Rights of Women, Children, and the Elderly.
Partner & Head of Litigation
Bundit Thaipalicharoen
Bundit Thaipalicharoen is an experienced Thai attorney specializing in criminal litigation and criminal procedural law, with more than two decades of professional legal practice.
He earned both his LL.B. and LL.M. in Natural Resources and Environmental Law from Thammasat University, graduating with distinction in his master’s degree studies. He is also a qualified Barrister-at-Law of Thailand (Thai Bar, Class 62) and holds a Lawyer License issued by the Lawyers Council of Thailand.
Mr. Bundit has served in several respected academic and professional roles, including as a law lecturer, legal trainer, and invited speaker for governmental and professional institutions. He previously served as Examiner for the Advocacy Training Institute of the Lawyers Council of Thailand, Committee Member of the Regional Lawyers Journal Committee (Region 1), Subcommittee Member on Children’s Human Rights, and Committee Member of the Thonburi Lawyers Council.
He currently serves on the Dispute Mediation Committee of the Lawyers Council of Thailand while continuing active criminal defense practice. He is also widely recognized for conducting advanced litigation workshops and professional legal training programs focused on criminal trial strategy and courtroom advocacy.
Mr. Bundit is additionally an author and legal researcher with published works and legal reform contributions in the fields of criminal law, environmental law, and corporate social responsibility.