Since Sept 2015, Professor, Lester Birbeck Endowed Chair, Petroleum Engineering Program, Missouri University of Science and Technology, Rolla, MO, USA. Sept 2011-Aug 2015, Associate Professor, Lester Birbeck Endowed Chair, Petroleum Engineering Program, Missouri University of Science and Technology, Rolla, MO, USA. Aug 2006-Aug 2011, Assistant Professor, Department of Geological Sciences and Engineering, Missouri University of Science and Technology (Formerly University of Missouri-Rolla), Rolla, MO,USA. July 2005-July 2006, Postdoc Scholar, Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), CA, USA. June 2002-June 2005, Research Assistant, New Mexico Petroleum Recovery and Research Center (PRRC), New Mexico Institute of Mining and Technology (New Mexico Tech) , Socorro, NM, USA. July 1995-May 2002, Petroleum Engineer/Team Leader, Conformance Control Team, Research Institute of Petroleum Exploration and Development (RIPED), China National Petroleum Corporation (CNPC) , and PetroChina Company Limited (PetroChina) , Beijing, P. R. China.

Conformance control to reduce excess water production using gels, expecially preformed particle gels. Chemical EOR methods, including polymer flooding, polymer-surfactant flooding, MEOR (biosurfactant), and Wettability alteration for carbonate reservoirs. CO2 and CO2 foam flooding, Shale Gas Development, Geological carbon sequestration, Reservoir numerical simulation, Multiphase flow in porous media