1985, Minister Counsellor (Commercial), Geneva; 1989, Deputy Director-General, Department of Business Economics; 1995, Minister (Commercial), Geneva; 1997, Senior Adviser to the Ministry of Commerce; 1999, Ambassador and Permanent Representative to WTO; 2002, Director-General, Department of Business Economics; 2002, Director-General, Department of Trade Negotiations; 2006, Director-General, Department of Foreign Trade; 2009, Deputy Permanent Secretary, Ministry of Commerce; 2009, Executive Chairperson, International Institute for Asia-Pacific Studies (INSAPS), Bangkok University; 2014, Deputy Minister of Commerce.; 2015-2017 Minister of Commerce; 2019 Chairperson of Senate Committee on Commerce and Industry