2005-Assistant Professor, Department of Radiology, Case Western Reserve University, Ohio .
2005- Assistant Professor, Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio .
2005-Member of Case Comprehensive Cancer Center, Case Western Reserve University, Ohio .
2002-2004 Senior Research Associate, Biomedical Engineering, Case Western Reserve University, Ohio .
2000-2001 Research Associate, Department of Biomedical Engineering, Case Western Reserve University .
1998-2000 Research Fellow, Biomedical Engineering, Nanyang Technological University, Singapore .
1995-1998 Research Assistant, Biomedical Engineering, Shanghai Jiao Tong University, Shanghai .
1993-1995 Principal Engineer, Department of Research & Development, Zhuhai Biolight Co. Guangdong .
1990-1993 Engineer, Research Institute of Shanghai Medical Electronics Co. LTD., Shanghai.
2003-2008 Associate Editor, Medical Physics. 2007-2008 Editorial Board of Clinical Medicine: Urology .
2006-2008 Secretary, Treasurer, Vice President of IEEE CBIG (Affiliated with IEEE National Societies: Engineering in Medicine and Biology, Computer, Signal Processing, Nuclear and Plasma Sciences in Cleveland) .
2007-2008 Program Committee of SPIE Medical Imaging - Visualization, Image-guided Procedures and Modeling Conference .
2000-2008 Reviewer for international journals: IEEE Trans. Medical Imaging, Biomedical Engineering, Nuclear Science; Journal of Magnetic Resonance Imaging, Academic Radiology, Cerebral Cortex, Journal of Neuroscience Methods, International Journal of Biomedical Engineering, Lasers in Surgery and Medicine, Medical Physics, Clinical Cancer Research .
2004-2008 Reviewer for international conferences: IEEE International Symposium on Biomedical Imaging: From Nano to Macro; IEEE Engineering in Medicine and Biology Society, IEEE Nuclear and Plasma Sciences Society; SPIE Medical Imaging .
2004-2008 Member of the Society of Nuclear Medicine (SNM)
2001-2008 Member of the International Society for Optical Engineering (SPIE)
2001-2008 Member of the Institute of Electrical and Electronic Engineers, Inc. (IEEE) 2001-2008 Member of the IEEE Engineering in Medicine and Biology Society (EMBS)