He has worked on various funded projects, with grants worth more than 6 million SGD. He has published more than 500 articles in refereed international SCI-IF journals (345) and international conference proceedings (42), and books (17) with more than 40,000 citations in Google Scholar (with H-index of 104). He is ranked in the top 1% of the Highly Cited Researchers for the last five consecutive years 2016–2020 in computer science according to the Essential Science Indicators of Thomson. He is on the editorial board of many journals and has served as a guest editor for many journals