He has also taught at Hong Kong University of Science and Technology and Hong Kong Polytechnic University. He has been actively conducting research in a few areas including queueing theory and stochastic models, supply chain management, logistics, container port management, and shipping economics. He has published his works in some of the leading journals of the fields including Management Science, Operations Research, Manufacturing and Service Operations Management, European Journal of Operational Research, Queueing Systems, Production and Operations Management, Maritime Policy and Management, and Transportation Research Part B.