GC_ONE REPORT 2021_ENG

Miss Pattaralada Sa-Ngasang Executive Vice President - Finance and Accounting Age : 56 Appointed : January 1st, 2021 Education/Training • Master of Business Administration, Thammasat University • Mini Master of Business Administration, National Institute of Development Administration • Bachelor of Accounting, Thammasat University • Diploma, National Defence College, The National Defence Course Class 61, National Defence College of Thailand (NDC) • Capital Market Leader Program (Class 22), Capital Market Academy • PTT - HBS Leadership Development Program, Class 2, Harvard Business School, U.S.A. • IMD - TLCA Leadership Development Program (LDP) Class 1, organized by Thai Listed Companies Association (TLCA) and IMD Business School, Switzerland • Treasury Management Program, Class 2, Fiscal Policy Research Institute Foundation, Ministry of Finance • Executive Development Program (EDP) Class 5, Thai Listed Companies Association (TLCA) • Global Leadership Business, Class 2, Cornell University, U.S.A • Leadership Succession Program, Class 11, Institute of Research and Development for Public Enterprises (IRDP) • Director’s Legal Liabilities, Ethical Leadership for new Era and High Performing Board & Board Effectiveness 2021 (In-house Programs by GC) Strategic Board Master Class (SBM) Class 1/2017 Role of the Chairman Program (RCP) Class 38/2016 and Director Certification Program (DCP) Class 151/2011, Thai Institute of Directors Association (IOD) Board member/Management in Listed Company – The Stock Exchange of Thailand : 2 • Executive Vice President reporting to Chief Financial Officer, PTT Public Company Limited • Executive Vice President – Finance and Accounting, PTT Global Chemical Public Company Limited Board member/Management in Non-Listed Company – The Stock Exchange of Thailand : 9 • Chairman, GC Treasury Center Company Limited • Director, GC Polyols Company Limited • Director, GC Oxirane Company Limited • Director, PTTGC International Private Limited • Director, PTTGC America Corporation • Director, PTTGC America LLC • Director, GC International Corporation • Director, Vencorex Holding • Director, Emery Oleochemicals UK Limited Work Experiences (5-years past experiences) 1 Jan 2021 - 31 Jan 2022 Director, PTTGC Innovation America Corporation 15 Jan - 1 Nov 2022 Director, Emery Oleochemicals (M) Sdn. Bhd. 15 Jan - 1 Nov 2022 Director, Emery Specialty Chemicals Sdn. Bhd. Oct 2015 - Dec 2020 Executive Vice President – Finance and Accounting, Thai Oil Public Company Limited May 2017 - Dec 2020 Chairperson, Thaioil Treasury Center Company Limited Jan 2010 - Dec 2020 Director, Ubon Bio Ethanol Public Company Limited Apr 2016 - Dec 2020 Director, Thaioil Ethanol Company Limited Mar 2017 - Dec 2020 Director, Thaioil Energy Services Company Limited Dec 2015 - Dec 2020 Director, Sapthip Company Limited Shareholding : None Relation among Family with other Directors, Management, Major Shareholders of the Company or Subsidiaries : None 363 BUSINESS OPERATION AND PERFORMANCE CORPORATE GOVERNANCE FINANCIAL REPORTS AND FINANCIAL STATEMENTS APPENDIX

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