1. Director, Department of Ophthalmology, Tri-service General Hospital, National Defense Medical Center, Taipei, Taiwan.
2. Attending Surgeon, Cornea and External Diseases Service, Refractive Surgery Service, Department of Ophthalmology, Tri-service General Hospital, National Defense Medical Center, Taipei, Taiwan.
3. Associate Professor, School of Medicine, National Defense Medical Center, Taipei, Taiwan. (August 2015 to present)
4. Assistant Professor, the Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan.