Simon SC Tay LL.B Hons (National University of Singapore) LL.M (Harvard) teaches international law at the National University of Singapore. He is concurrently chairman of the Singapore Institute of International Affairs, a non-governmental think tank. Since July 2002, he has been chairman of the National Environment Agency, the country's major agency for environmental protection and public health. In Fall 2003, he was a visiting professor, teaching at the Harvard Law School and Fletcher School of International Law and Diplomacy.

He was selected for three terms as a Nominated Member of the Singapore Parliament (1997 ? 2001) and has served to lead public consultations on Singapore in the 21st century, the national concept plan, and the Singapore Green Plan 2012.

He was a Fulbright scholar (1993-94) at Harvard Law School, and in Jan 2000, the World Economic Forum (Davos) named him a "global leader of tomorrow. His work on international law and policy focuses on sustainable development, peace and governance, especially in Asia and ASEAN.

He serves on a number of international and regional expert and eminent person panels, including the ASEAN Regional Forum register of eminent persons and experts, the China International Council on Environment and Development, and the Asia Pacific Forum on Environment and Development. In 1999-2000, he co-chaired an eminent persons' group on Japan-ASEAN relations and also served on a joint team to study and negotiate a free trade agreement between Japan and Singapore.

Simon previously practised law at large commercial practice and served as coordinator for the Singapore Volunteers Overseas, sending teachers, doctors, and others to Asia and Africa. During his undergraduate years at the National University of Singapore, he was president of the Students' Union for three terms, and led a petition against government policy. He is also a writer of stories and poems, with five published works. In 1995, he was named Singapore Young Artist of the Year.

He is married to Ms Siow Jin Hua and they have a son, Luke Jun Yong Tay, born in 1997.