Prior to this, he had worked in McMaster University in Canada and University of Illinois at Urbana-Champaign. His recent research interest lies mainly in optimization modeling, theoretical analysis and algorithm design with applications to healthcare, big data and finance. He has published a research monograph by Princeton University Press and over sixty papers in major optimization journals and various CS/IEEE conference proceedings. His research has been recognized by numerous awards from academic communities and supported by various funding agencies in Canada and USA.