Currently Adjunct Research Professor at the Tropical Marine Science Institute, National University of Singapore. PhD in Zoology obtained from the University of Singapore in 1976. Joined and have been with the university since 1977. Research area is coral reef ecology and integrated coastal management. Coordinated and edited the 2009 State of the Marine Environment Report for the East Asian Seas for the United Nations Environment Programme. Current research focus is reef restoration with particularly interest on how corals can be re-established in highly turbid conditions. Was a member of the Scientific Advisory Committee of the Global Coral Reef Monitoring Network (International Coral Reef Initiative), serving as Chairman from 2003 to 2005. Am Honorary Fellow of the Singapore Institute of Biology and Fellow of the Singapore National Academy of Science.