Feb.,2008-present,         Professor, 
                                      School of Aerospace, Xi’an Jiaotong University,Xi’an, 
                                      P.R. China

Sept., 2005-Jan., 2008, Research Scientist, 
                                      Virginia Polytechnic Institute and State University,  
                                      Blacksburg, VA

Oct., 2001-Aug., 2005,  Postdoctoral Research Associate, 
                                      Dept. of Engineering Science and Mechanics 
                                      Virginia Polytechnic Institute and State University,    
                                      Blacksburg, VA
Aug., 1996-May, 2001,  Teaching Assistant, 
                                      Dept. of Engineering Science and Mechanics Virginia  
                                      Polytechnic  Institute and State University,               
                                      Blacksburg, VA
Mar., 1995-Aug., 1996,  Assistant Professor, 
                                      Dept. of Flight Vehicle Design and Applied Mechanics,
                                      Beijing University of Aeronautics and Astronautics,           
                                      Beijing, P. R. China
Mar., 1995 - Aug., 1996, Participation in the management of two contracted research projects:
                                       • Analysis of Dynamic Behaviors of Long-Span Suspension  Bridges,
                                       (with FEM software package developed), contracted with National Highway 
                                       Research  Center,  P. R. China.
                                      • Aeroservoelastic Analysis and Control Design of a Civil Transport Aircraft,
                                        P. R. China.