行政院經濟建設委員會
In his early career, Duh worked as a specialist at the MOEA National Bureau of Standards in 1983–1994, Executive Officer and Section Chief of 5th Directorate of the Executive Yuan in 1994–1997, Senior Technical Specialist of the Industrial Development Bureau (IDB) in 1997, Director of the 6th Division of the IDB in 1997–2001, Chief Secretary of IDB in 2001–2003, Deputy Director-General of the MOEA Small and Medium Enterprise Administration in 2003-2004, and as Chief Secretary of Council for Economic Planning and Development in 2004. He then remained in the MOEA serving as the Director-General of the Department of Commerce in 2004–2006, Counselor in 2006–2007, Director-General of the Department of Industrial Technology in 2007-2009m and Director-General of the IDB in 2009–2012.