• 2017-2018: Secretary-General, Office of the President, Republic of China (Taiwan)
• 2016-2017: Secretary-General, National Security Council, Republic of China (Taiwan)
• 2014-2016: Secretary-General, Democratic Progressive Party (DPP), Republic of China
(Taiwan)
• 2012-2014: Executive Director, Committee on Policy Research and Coordination, Democratic Progressive Party (DPP), Republic of China (Taiwan)
• 2012-2016: Representative to the United States, Democratic Progressive Party (DPP), Republic of China (Taiwan)
• 2007-2008: Representative, Taipei Economic and Cultural Representative Office in the United States
• 2004-2007: Chairman, Mainland Affairs Council, Republic of China (Taiwan)
• 2002-2004: Deputy Secretary-General, Office of the President, Republic of China (Taiwan)
• 1989-2002: Research fellow, Institute of International Relations, National Chengchi University, Republic of China (Taiwan)