Asst. Prof. Dr. Chaiyaporn Puprasert Age: 55 Years Appointed Positions Independent Director/Member of the Corporate Governance and Sustainability Committee Date of being an Independent Director 31 March 2021 Date of being the Member of the Corporate Governance and Sustainability Committee 19 June 2023 Years of being an Independent Director 2 Years 9 Months Possession of IRPC shares (%) No. of share “IRPC”: - Share Possession: - % Family relationship within the Company, major shareholder or subsidiaries None Education/Training • Bachelor of Engineering in Sanitary Engineering, Chulalongkorn University • Master of Engineering (Environmental Engineering), Chulalongkorn University • Ph.D. in Environmental Engineering, Institute National de Science Applique’e de Toulouse (INSA-Toulouse), France • Certification in Top Executives in the Poom Palung Pandin Program, Class 5, Chulalongkorn University • Director Accreditation Program (DAP), Class 102/2013, Thai Institute of Directors Association (IOD) Work experience within the past 5 years Apr. 2021 - Jun. 2023 Member of the Corporate Governance Committee, IRPC Public Company Limited May 2016 - Apr. 2018 Assistant to the president for Student and Alumni Affairs, Chulalongkorn University Apr. 2010 - May 2016 Head of Environmental Engineering Department, Faculty of Engineering, Chulalongkorn University Mar. 2013 - Feb. 2016 Independent Director/Member of the Audit Committee, Daii Group Public Company Limited Current Position Board member/Management in Listed Company - The Stock Exchange of Thailand Jun. 2023 - Present Member of the Corporate Governance and Sustainability Committee, IRPC Public Company Limited Mar. 2021 - Present Independent Director, IRPC Public Company Limited Board member/Management in Non-Listed Company - The Stock Exchange of Thailand Apr. 2021 - Present Director, Chulalongkorn University Alumni Association Oct. 2019 - Present Expert member in Water Pollution Control Sub-Committee, Department of Pollution Control, Ministry of Natural Resources and Environment May 2018 - Present Vice President for Student Affairs, Chulalongkorn University Dec. 1995 - Present Assistant Professor, Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University General Aittipol Suwannarat Age: 61 Years Appointed Positions Independent Director/Member of the Nomination and Remuneration Committee Date of being an Independent Director 5 April 2022 Date of being the Member of the Nomination and Remuneration 18 April 2023 Years of being an Independent Director 1 Year 7 Months Possession of IRPC shares (%) No. of share “IRPC”: - Share Possession: - % Family relationship within the Company, major shareholder or subsidiaries None Education/Training • Bachelor of Science Program, Chulachomklao Royal Military Academy, Class 22 • Master of Political Science, Burapha University • National Defence College (NDC), Class 60/2017 Work experience within the past 5 years Apr. 2022 - Apr. 2023 Member of the Corporate Governance Committee, IRPC Public Company Limited Oct. 2021 - Sep. 2022 Army Senior Advisor, Office of the Commander Oct. 2020 - Sep. 2021 Army Advisor Apr. 2019 - Sep. 2020 Deputy Commanding General, Territorial Defense Command Oct. 2018 - Mar. 2018 1st Corps Deputy Commander Oct. 2016 - Sep. 2018 Commanding General, The 13th Military Circle Current Position Board member/Management in Listed Company - The Stock Exchange of Thailand Apr. 2023 - Present Member of the Nomination and Remuneration Committee, IRPC Public Company Limited Apr. 2022 - Present Independent Director, IRPC Public Company Limited Board member/Management in Non-Listed Company - The Stock Exchange of Thailand Dec. 2021 - Present Director, KTB General Services and Security Company Limited 30 Board of Directors, IRPC Public Company Limited IRPC Public Company Limited
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