Public health
Infectious disease
Sexually transmitted diseases

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Taiwan Counter Contagious Diseases Society, Honorary Managing Director
Taiwan Counter Contagious Diseases Society, Secrectary General
Adimmune Corporation, Advisory Committee
Taiwan Counter Contagious Diseases Society, Managing Director
Ministry of Health and Welfare-- Communicable Disease Control Medical Network, Central District Commander
Centers for Disease Control, Department of Health, R.O.C (Taiwan)-- Communicable Disease Control Medical Network, Central District Commander
Taichung City Government, Municipal consultant
China Medical University Hospital, Department of Internal Medicine, Director of Infectious Diseases