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Justice Chan Seng Onn was appointed Judicial Commissioner in 1997 and High Court Judge in 2007. He retired on 3 January 2022 before returning as Senior Judge on 5 January 2022.

Born in Singapore, he received his Bachelor of Laws from the National University of Singapore in 1986, and Master of Laws from Cambridge University in 1987.

He joined the Singapore Legal Service in 1987 and became State Counsel and Deputy Public Prosecutor in the Attorney-General’s Chambers (AGC). Subsequently, he was posted to Supreme Court as Senior Assistant Registrar in 1991, before returning to AGC as Senior State Counsel in 1994. He was appointed Judicial Commissioner on 15 October 1997. In 2001, he returned to AGC as Solicitor-General. He was appointed Senior Counsel in 2001 and was the President of the Industrial Arbitration Court from October 2007 to January 2021.

Before joining the legal service, Justice Chan was a President scholar and a Colombo Plan scholar. He graduated with a Bachelor of Science degree from the University College, London. This was followed by a Master of Science degree in Industrial Engineering and a Diploma in Business Administration from the National University of Singapore.

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