Page 311 - 56-1 One Report 2022 EN

Attachment 1 Information of Directors, Executives, Controlling Person, Head of Accounting and Finance,
Accounting Controller, and Company Secretary as of 31 December 2022

1. Information of Directors, Executives, Executive who is assigned the highest responsibility in accounting and finance, and who is assigned direct responsibility
for accounting supervision and Company Secretary as of 31 December 2022

Relationship Working Experiences in the 5 preceding years
Name - Surname / Position / % between
Date of Appointment Age Education / Training Shareholding Directors and Duration Position Organization / Company / Type of
(1)
Business
Executives
1. Mr. Somprasong Boonyachai 67 Highest Education None None Oct 2021 – Present Chairman of the Board of Thaicom Plc.
 Chairman of the Board of Directors • Master Degree in Engineering, Asian Institute of Technology Directors, Independent Director,
 Independent Director (AIT) and Member of the Nomination
 Member of the Nomination and and Compensation Committee
Compensation Committee IOD Training Programs Position in other listed companies
 Role of the Chairman Program (RCP), Class 21/2009 2022 - Present Member of Sustainability, Gulf Energy Development Plc.
Date of Appointment  Directors Certification Program (DCP), Class 65/2005 Governance and Risk
21 October 2021  Directors Accreditation Program (DAP), Class 30/2004 Management Committee
Apr 2022 – Present Independent Director Gulf Energy Development Plc.
Other Training / Seminars Jun 2022 – Present Chairman of the Board of Power Line Engineering Plc.
 National Defense College of Thailand (NDC 4313) Directors
 Graduate School of Business, Stanford University: Leading 2002 - Present Independent Director and Power Line Engineering Plc.
Change and Organizational Renewal Member of the Audit Committee
 IMD International, MIT Sloan: Leadership Dilemmas and Jan 2022 - Present Chairman of the Board of Osotspa Plc.
Profitable Growth Directors
 King Prajadhipok’s Institute: Politics and Governance in Jul 2017 – Present Independent Director Dusit Thani Plc.
Democratic Systems for Executives Program, Class 11 Jan 2017 – Present Director BEC World Plc.
 Executive Program Class 6, The Capital Markets Academy Position in other non-listed companies
(CMA) 2019 – Present Honorary Director King Mongkut's University of Technology
 Top Executive Program in Commerce and Trade (TEPCoT 4) Thonburi
 Harvard Business School: Corporate Restructuring, Mergers, 2018 - Present Honorary Director Geo-Informatics and Space Technology
and Acquisitions Development Agency

Attachment 1 Page 1