Bachelor's in Chemical Engineering, Chulalongkorn University; Master's in Chemical Engineering, Rice University; Master's in Petroleum Engineering, University of Houston, US. 1984, Engineer, Unocal Thailand. 1989-2004, with PTTEP: Reservoir and Planning Manager; executive positions in corporate planning, business development, operations and asset management. 2004-2012, with PTT Public Company: Executive Vice-President for international expansion; Senior Executive Vice-President, Corporate Strategy and Development; Chief Financial Officer. 2012, President and CEO, PTTEP. Since 2015, President and CEO, PTT Group. Fellow Member, IOD.