He has held numerous teaching posts in his many years overseas at such schools as Cornell University, the University of Illinois, and the Illinois Institute of Technology. Currently, he teaches at the University of Pittsburgh. Over the years he has delivered over 240 research papers and advised over 200 doctoral candidates.
他曾在康乃爾大學、伊利諾大學、伊利諾理工學院等校任教，長年旅居美國，漂泊異域，現任匹茲堡大學教授，發表過二百四十多篇研究論文，指導過兩百多位博士生。