GC_ONE REPORT 2021_ENG

(2) HEAD OF CORPORATE COMPLIANCE Mrs. Rattana Nakasiri as Vice President, Corporate Governance, has been assigned as Head of Corporate Compliance on October 15, 2015. The responsibilities include overseeing corporate compliance, promoting corporate governance in business practices, and ensuring that the Executives and employees of GC Group comply with laws, rules, and regulations in countries where GC operates. Name - Surname : Mrs. Rattana Nakasiri Vice President - Corporate Governance Age : 58 Appointed : October 15th, 2015 Education / Training : Master of Business Administration, National Institute of Development Administration : Bachelor of Economics, Ramkhamhaeng University : PTTGC Group VP: Leadership Development Program (LDP2) 2015 : Business Simulation for VP: CELEMI Decision Base, KNOWLEDGE CO., LTD : Corporate Compliance Overview - Executive, Hunton & Williams : Director’s Legal Liabilities, Ethical Leadership for new Era and High Performing Board & Board Effectiveness 2021 (In-house Programs by GC), Director Certification Program (DCP) Class 290/2020, Ethical Leadership Program (ELP) Class 15/2019, Risk Management Program for Corporate Leaders (RCL) Class 11/2018, IT Governance and Cyber Resilience Program (ITG) Class 8/2018, Company Reporting Program (CRP) Class 17/2017, Roles of Company Secretaries in Corporate Governance Promotion Seminar, IOD Open House 1/2017, Company Secretary Program (CSP) Class 69/2016, Board Reporting Program (BRP) Class 20/2016, Effective Minute Taking (EMT) Class 35/2016, Anti-Corruption: The Practical Guide (ACPG) Class 29/2016, and Corporate Governance for Executive (CGE) Class 7/2016, Thai Institute of Directors Association (IOD) Board member/Management in Listed Company – The Stock Exchange of Thailand : 1 : Vice President - Corporate Governance, PTT Global Chemical Public Company Limited Board member/Management in Non-Listed Company – The Stock Exchange of Thailand : None Work Experiences (5 years past experiences) 29 Oct 2019 – 30 Sep 2021 Director, GC Estate Company Limited Shareholding : None Relation among Family with other Directors, Management, Major Shareholders of the Company or Subsidiaries : None 381 BUSINESS OPERATION AND PERFORMANCE CORPORATE GOVERNANCE FINANCIAL REPORTS AND FINANCIAL STATEMENTS APPENDIX

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