Age: 54 Years Appointed: 1 March 2023 Mr. Sombat Silsangwon Senior Vice President - Aromatics Education/Training Bachelor of Industrial Technology, King Mongkut’s Institute of Technology Ladkrabang GC X INSEAD Global Leadership Acceleration Program, 2022 (G-LAP) (In-house Programs by GC and INSEAD), PTT Global Chemical Public Company Limited Advance Management Program, 2019, PTT Leadership and Learning Institute (PLLI), PTT Public Company Limited Management Development Program, Class 24/2016, Thailand Management Association (TMA) Board Member/Management in Listed Company - The Stock Exchange of Thailand : 1 Senior Vice President - Aromatics, PTT Global Chemical Public Company Limited Board Member/Management in Non-Listed Company - The Stock Exchange of Thailand : 2 Director, GC-M PTA Company Limited Director, Thai PET Resin Company Limited Work Experiences (5-year Past Experiences) 1 Oct 2016 - 28 Feb 2023 Vice President - Olefins Plant II, PTT Global Chemical Public Company Limited Shareholding : Spouse 2,000 Shares (0.000044%) As of 31 December 2023 Relation among Family with other Directors, Management, Major Shareholders of the Company or Subsidiaries : None Age: 55 Years Appointed: 1 October 2019 Mr. Ratchada Sawasdirak Senior Vice President - Refinery Education/Training Master of Public Administration, Chulalongkorn University Bachelor of Engineering (Mechanical Engineering), Mahanakorn University of Technology Ethical Leadership 2020: Ethical Challenges in New Normal, PTT Global Chemical Public Company Limited Subsidiary Governance and Transformative Leadership for Global Enterprise, 2022, Director’s Legal Liabilities, Ethical Leadership for New Era and High Performing Board & Board Effectiveness, 2021 (In-house Programs by GC) and Director Certification Program (DCP), Class 287/2019, Thai Institute of Directors Association (IOD) Board Member/Management in Listed Company - The Stock Exchange of Thailand : 1 Senior Vice President - Refinery, PTT Global Chemical Public Company Limited Board Member/Management in Non-Listed Company - The Stock Exchange of Thailand : 1 Director, NPC Safety and Environmental Service Company Limited Work Experiences (5-year Past Experiences) 2 Jan 2020 - 19 Sep 2022 Director, Thai Tank Terminal Limited Shareholding : None Relation among Family with other Directors, Management, Major Shareholders of the Company or Subsidiaries : None 388
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