04/2007 – present: Assistant Professor in the Department of Nutrition and Food Science, Texas A&M University

02/2006 - 03/2007: Principal Scientist and Biological Leader in the Department of Metabolic Diseases, Hoffmann-La Roche.

09/2003 - 02/2006: Research Assistant Professor in the Department of Biochemistry, Molecular Biology and Biophysics, Medical School, University of Minnesota

08/2001 – 01/2006: Research Associate in the Department of Biochemistry, Molecular Biology and Biophysics, Medical School, University of Minnesota

08/1998 – 07/2001: Postdoctoral Research Associate in the Department of Biochemistry, Molecular Biology and Biophysics, Medical School, University of Minnesota

09/1995 – 07/1998: Research Assistant in the Institute of Hepatology, Beijing Medical University

09/1992 – 07/1995: Research Assistant in the Institute of Integration of Chinese and Western Medicine, Tongji Medical University

09/1991 – 07/1992: Intern, Department of Internal medicine, Hubei Hospital, Hubei College of Chinese Medicine