KOH Swee Yen, Senior Counsel, is a Partner in the Commercial & Corporate Disputes, and International Arbitration Practices.

Her practice has a particular focus on complex, high-value and cross-border disputes across a wide spectrum of matters from commercial, energy, international sales, trade, transport, technology to investment. She regularly appears before the Singapore Courts and in international arbitrations under the major institutional rules, including ICSID, ICC, ICDR, LCIA, SIAC, and UNCITRAL.

Swee Yen graduated with First Class Honours from the National University of Singapore (NUS). She was awarded the Singapore Academy of Law prize for being the top student in her final year, and won subject prizes for Evidence and Procedure and Intellectual Property Law. Swee Yen served as a Justices' Law Clerk to the Chief Justice of Singapore before entering private practice. During her time in practice, she received appointments as Law Clerk to assist the Competition Appeal Board in the first and subsequent appeals lodged against the Competition Commission of Singapore's Infringement Decisions relating to price fixing matters, and was also on the Supreme Court's Young Amicus Curiae scheme in 2010.

Swee Yen is the Vice-Chair of the IPBA Dispute Resolution and Arbitration Committee, and a member of the ICCA-ASIL Task Force on Damages. She was the former Vice-Chair of the IBA Arbitration Committee, and was also on the Editorial Board of the ICC Dispute Resolution Bulletin. She has sat as an arbitrator in SIAC and ICC administered arbitrations, and is also on the Panel of Arbitrators of the Asian International Arbitration Centre, Hong Kong International Arbitration Centre and Korean Commercial Arbitration Board. She is a council member of International Law Association – Singapore Branch. Swee Yen has also been appointed to the Executive Committee of the Foundation for International Arbitration Advocacy.

She has been a member of the Rules of Court Working Party since 2005, and was also a member of the Civil Justice Commission whose work culminated in the promulgation of the new Rules of Court 2021 which seeks to effect transformative changes to the litigation process in Singapore.

She is appointed by the Ministry of Home Affairs as a member of the Public Entertainment Appeal Board, Criminal Law Advisory Committee (Hearing) and is also a member of the Casino Regulatory Authority's Patron Dispute Committee.


Matters of significance in which Swee Yen has been involved in include the following:

  • Acting against States in various investment treaty arbitrations and court proceedings, including acting for foreign investors against Laos PDR in investment treaty claims arising from the misappropriation of gaming investments and securing a ground-breaking victory on the applicability of PRC bilateral investment treaties to Macau S.A.R. based on state succession principles, acting against the Kingdom of Lesotho in an investment treaty arbitration for expropriation of diamond mining leases and in an application to set aside an investment treaty award finding the State liable for denial of justice in relation to its role in the shuttering of the Southern African Development Community Tribunal, and in cross-border enforcement and execution proceedings against various States and State-owned entities.

  • Acting for States in various investment treaty arbitrations and court proceedings, including successfully defeating an ICSID claim brought against the Independent State of Papua New Guinea for expropriation of mining assets and acting for the State in court proceedings concerning the management of US$1.5 billion of assets, and acting for a State against a multinational automobile manufacturer in challenging a jurisdictional award in an investment treaty arbitration concerning claims in connection with certain tax incentives allegedly promised by the State, which was to be heard before the Singapore International Commercial Court.

  • Acting as counsel in energy disputes, including for a renewable energy company against an investment company over a US$350 million share purchase transaction, for a Thai coal-mining entity in relation to its US$450 million claim arising from the termination of a power plant project, for PRC investors in a dispute concerning a US$80 million petroleum exploration and production project in Georgia, for an affiliate of a leading Nigerian oil and gas conglomerate against a PRC state-owned oil entity for breach of an international sales contract for crude oil valued at over US$60 million; for shareholders of an oil trading company against the international arm of Yukos Oil in a US$55 million fraud and asset-tracing multijurisdictional claim.

  • Acting as counsel in various transport-related disputes, including acting for a leading aircraft manufacturer against a Chinese aviation company in respect of claims in excess of EUR 150 million arising out of the termination of an agreement granting exclusive licensing, production and sales rights and acting for a leading logistics company in claims concerning alleged breaches of various investment agreements concerning entities across multiple jurisdictions including India, Japan and Hong Kong S.A.R.

  • Acting as counsel in various telecommunications and technology-related disputes across sectors involving mobile telecommunications operators, digital payment service providers and content-service providers and obtaining search orders and other injunctive relief in intellectual property-related disputes.

  • Acting as counsel in various commercial and corporate disputes, including for the founder of Mustafa Centre, an iconic retail and tourist landmark in Singapore, in multiple purported minority oppression suits; for one of the founders of TWG Tea, a luxury tea brand, in various disputes relating to the founding, development and management of TWG Tea; for individual shareholders in representative action and related proceedings in relation to the distribution and management of the proceeds of sale of a hotel in excess of S$100 million; for a family office in proceedings concerning investments in private equity funds and other assets valued at over US$127 million.

Related Practices

  • Commercial & Corporate Disputes
  • International Arbitration
  • Vietnam

Swee Yen is highly recommended for her expertise in resolving complex international disputes, and is named in various legal publications, including The Legal 500, Chambers Asia-Pacific, Chambers Global and Benchmark Litigation Asia-Pacific.

Most recently, she was awarded Woman Lawyer of the Year (Law Firm) at the ALB SE Asia Law Awards 2021. She has been listed as one of the world's leading arbitration practitioners in Who's Who Legal: Arbitration 2022 as well as a leading litigation practitioner in Who's Who Legal: Commercial Litigation 2021.  She is also a recognised expert in Commercial Arbitration in Experts Guides: The World’s Finest Lawyers Chosen By Their Peers.

Described as being "in a league of her own", "extremely talented", "incredibly hard-working and persistent" with a "very deep understanding of the law" and "razor-sharp" in her advocacy by Chambers Global, sources also praise her for a "keen sense of strategy" and "great ability to quickly grasp her clients' perspective and understand their commercial issues".

The Legal 500 says that Swee Yen is the "go-to disputes lawyer in Singapore", with an "ability to zone right in on the issues with precision and confidence", and is "brilliant, decisive and fearless". She has also been commended in Chambers Asia-Pacific for being "a tenacious litigator" that is "very hard-working and talented".

Clients applaud Swee Yen as someone who "always brings her A-game to everything she does and someone you want in your corner in a life or death situation." Clients also highlighted that Swee Yen is "very quick to pick things up, has great foresight and possesses the ability to identify things to focus on and things to drop."