Doctor, Dr. Lin Yu-Jung Clinic (05/16/1996-08/05/2020)
Resident Doctor, Department of Otolaryngology, Cathay General Hospital (09/1989-06/1990)
Resident Doctor, Department of Family Medicine, Mackay Memorial Hospital (07/01/1992-07/31/1995)
Adjunct Attending Physician, Department of Family Medicine, Mackay Memorial Hospital (07/01/2000-06/30/2006)
Founding Member/Director, Organization Department/Decision-making Member, New Power Party (NPP) (01/25/2015-
02/28/2019); Chairperson, Yunlin and Yilan County NPP Offices
Convener, Nomination Committee for 2018 Taiwanese Local Elections, NPP; Member, Nomination Committee for 2020
Taiwanese Legislative Election, NPP