Our Company

Opus Law International combines both Thai licensed and English qualified lawyers that strive to provide professional, efficient, and affordable services for all of our clients. Our team comprises of a UK consultant with over 30 years experience as Solicitor of the Supreme Court in England and Wales and an English-speaking Thai licensed lawyer with over 12 years experience. Their practice areas include, but are not limited to, visas and immigration, property, litigation, family and children and business services.

We promise to provide a free initial interview at our office. If you require us to see you away from our office, we reserve the right to charge for travel expenses.

We promise to provide full and transparent information about our competitive fees and to update you about any potential changes to your case.

We aim to give clear and concise advice and assistance with realistic prospects of success in any litigation case. If we do not believe we can assist with your case, you will be told so at the earliest possible time.

We promise that you will be able to be seen by an English speaking lawyer.


Our Team

Philip Sweeney

Director and Legal Consultant

Philip Sweeney qualified as a Solicitor in 1980 and practiced in West Yorkshire. He was the Senior Partner of Opus Law (a Legal 500 firm) with offices in Bradford London and Birmingham, dealing with all Serious Fraud and Complex  Crime and Regulatory matters until his retirement as a Partner in 2014. He as a Solicitor gained his Higher Rights enabling him to appear in any Criminal Court throughout England and Wales. He is retained as a Consultant Solicitor to his firm in England. He commutes between Chiang Mai and Bangkok on a regular basis.

Wirun Suwanno


Wirun Suwanno has had legal experience both at home, in Thailand, and abroad. He attended Thammasat University, where he gained his Bachelor’s degree in Law; and obtained his LLM (Master of Law) in Commercial Law from the University of Sheffield, a top ranked law school in the United Kingdom. In addition to being a licensed Notarial Services Attorney, he has extensive experience in criminal and civil litigation – more specifically, commercial legal matters (BOI and Transnational Company Share Purchase Agreements) that would be beneficial knowledge for any expatriates with businesses in Thailand. Suwanno has been a licensed lawyer in Thailand since 2002.

Pongpat Riangkruar

Legal Advisor

Pongpat Riangkruar LLB, LLM, PhD, Barrister at Law

Pongpat commenced his career as a Legal Officer for the Council of State. Later he was assigned to the Secretary of the Legislation Draft Committee providing law drafting services and legal opinion to the Cabinet and Government Organisations. From 1982-2007 he worked as a State Attorney for the Attorney General's Office. During this time he obtained two Master's Degrees in Law, one from the USA and a PhD from Maghad University, India. In 2007 he transferred to the Ministry of Justice and held key positions such as the Director of Legal Bureau, Director of Information Technology, Chief Knowledge Officer of the Ministry, Thai delegate to the UN Convention against Corruption, Member of Legal Advisory Boards to Government organisations. He retired from Government Service in 2014. He is now a part time University lecturer and Legal Adviser to two International Law firms.

Our Areas of Expertise


Latest News  

Buying a Condo in Thailand

Buying a Condo in Thailand

by psweeney  Comments (0)
For a foreigner, buying a condominium unit in Thailand is one of the most simple forms of acquiring ownership interest in Thailand real estate. In general, foreigners are not allowed to acquire or own a...


  • “I would like to acknowledge Philip of Opus Law to be an outstanding attorney who goes above and beyond each and every time we have required his services. I highly recommend using Opus Law and I see them fast becoming the best law firm in Thailand. They provide a bilingual support team who give you confidence from the very beginning and every step of the way and as an expert working in Thailand, I am glad Philip made the decision to bring his expertise to Bangkok.”

    Idris Asghar

    CFA, Senior Finance Consultant

  • “Philip is an extremely conscientious man with high professional and ethical standards. He is hard working, honest and entirely trustworthy. It is a pleasure to deal with him at a professional and personal level. I can recommend him without hesitation as a completely responsible and reliable person.”

    Charles Bott QC

    Carmelite Chambers

  • “I know Philip Sweeney as a man whose integrity I have never had cause to question, nor have I heard anyone else question it. He is entirely reliable. If he says that he will do something then you can depend on him to do it.”

    HHJ Peter Collier QC

    Judiciary of England and Wales

  • “Philip Sweeney of Opus Law provided a highly professional and thorough service. I would highly recommend him and his firm.”

    Mark O’Brien

    Opus Law client