Professor, Department of Immunology, The University of Texas MDAnderson Cancer Center, USA
2006-2007
Distinguished professor, Department of Microbiology & Immunology,Pennsylvania State University College of Medicine, USA
 
2002-2006
Professor, Department of Microbiology & Immunology,Pennsylvania State University College of Medicine, USA
 
1999-2002
Associate Professor, Department of Microbiology & Immunology,Pennsylvania State University College of Medicine, USA
 
1994-1999
Assistant Professor, Department of Microbiology & Immunology,Pennsylvania State University College of Medicine, USA
 
1992-1994
Postdoctoral Fellow, The Gladstone Institute of Virology and ImmunologyUniversity of California, San Francisco (advisor: Warner Greene)
 
The main research in Sun lab is to investigate the molecular mechanisms of anticancer immunity, autoimmunity and inflammatory diseases, focusing on the function and regulation of T cells.