The Board Of Directors

Mr.Sujarit Patchimnan
Chairman
- Chairman at May 10, 2016
- Chairman of the Nomination and Remuneration Committee at May 10, 2016
- M.A. in political science, Thammasat University
- B.A. in political science, Thammasat University
- Director Accreditation Program (DAP) 41/2005 Thai Institute of Directors Association
Period | Position | Company Name |
2013– Present 2016 – Present 2007– 2017 | Listed Companies Director Audit Committee/ Independent Director Director Other Companies Competitive Business related to Company’s Business |
Pan Asia Footwear PLC. Saha Pathana Inter-Holding PLC. Saha Pathanapibul PLC. 2 |

Miss Choosri Kietkajornkul
Vice Chairman
- Vice Chairman at December 14, 2021
- Nomination and Remuneration Committee at December 14, 2021
- Authorized Director
- M.A. in political science,Thammasat University
- B.A. in political science,Thammasat University
- Director Accreditation Program (DAP) 41/2005 Thai Institute of Directors Association (IOD)
Period | Position | Company Name |
2021-Present
2021 – Present 2021 – Present | Deputy Governor – Governor’s Office, Listed Companies Chief Executive Officer and Director Directors Other Companies Competitive Business related to Company’s Business | Electricity Generating Authority of Thailand
RATCH Group PCL Bangkok Aviation Fuel Services PCL 7
|

Mr.Sakarin Tangkavachiranon
Director
- Director at December 14, 2021
- Chairman of Executive Committee at May 13, 2022
- Nomination and Remuneration Committee Member at December 14, 2021
- Authorized Director
- Master of Public and Private Management Program (Honor), National Institute of Development Administration
- Bachelor of Engineering (Mechanical Engineering), Kasetsart University
- Director Certification Program (DCP) 221/2016 Thai Institute of Directors Association (IOD)
Period | Position | Company Name |
2020 – Present 2021 – Present 2019
| Listed Companies Chief Business Development Officer Director Executive Vice President – Power Executive Vice President – Project Senior Vice President – Chief Other Companies Competitive Business related to Company’s Business) |
RATCH Group PCL Principal Capital PCL RATCH Group PCL
10
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Mrs.Wadeerat Charoencoop
Director
- Director at December 14, 2021
- Authorized Director
- Master of Business Administration (Business Administration) The University of Washington, USA
- Bachelor of Business Administration (Finance)(2nd Class Honor), Chulalongkorn University
- Corporate Governance for Executives (CGE SCCC/2015)
- Director Certification Program (DCP) 276/2019
- Directors Diploma Examination (Exam) 71/2019 Thai Institute of Directors Association (IOD)
- Directors Diploma Program (Fellow Member) 9992 Thai Institute of Directors Association (IOD)
Period | Position | Company Name |
2019-Present 2021 – Present 2018-2019 2014 – 2017
| Listed Companies Chief Financial Officer Directors Executive Vice President-Financial Head of Group Finance, Treasury, Tax and IR Other Companies Competitive Business related to Company’s Business) |
RATCH Group PCL Bangkok Aviation Fuel Services PCL RATCH Group PCL Siam City Cement PCL
|

Mr.Udompong Chuntharumporn
Director and Managing Director
- Director at December 14, 2021
- Managing Director at December 14, 2021
- Executive Director at December 14, 2021
- Chairman of the Sustainability Committee at May 12, 2023
- Authorized Director
- Master of Engineering (Mechanical Engineering), Kasetsart University
- Bachelor of Engineering (Mechanical Engineering) (2nd Class Honor), King Mongkut’s University of Technology North Bangkok
- Director Certification Program (DCP) 314/2022 Thai Institute of Directors Association (IOD)
Period | Position | Company Name |
2021 – Present
2020
2019-2020
| Listed Companies Vice President Head of Domestic Vice President Head of Domestic and Domestic and Neighboring Countries Division, RATCH Group PCL Other Companies Competitive Business related to Company’s Business) |
RATCH Group PCL
RATCH Group PCL
RATCH Group PCL
3
|

Mr.Thirasak Vikitset
Director
- Director at March 6, 2003
- Authorized Director
- Honorary Doctorate Degree in Business Administration (Management), Sripratum University
- Honorary Doctorate in Business Administration College of Commerce, Burapha University
- Honorary Doctorate in Business Administration, Naresuan University
- B.S. Mechanical Engineering – Worcester Polytechnic Institute, Massachusetts, USA
- Director Accreditation Program (DAP) 3/2003
- Director Certification Program (DCP) 41/2004 Thai Institute of Directors Association
Period | Position | Company Name |
1985 – Present | Listed Companies Chairman of the Executive Board/Managing Director/ Director of the Nomination and Remuneration Committee Other Companies Competitive Business related to Company’s Business |
S&J International Enterprises PLC.
|

Mr.Vichai Kulsomphob
Director
- Director at April 23, 2018
- Nomination and Remuneration Committee Member at December 14, 2021
- Authorized Director
- Master of Marketing (English Program) Thammasat University
- Master of International Business (Exchange Program)
- Master of Advanced Business Practice University of South Australia
- Bachelor’s Degree of Business Administration Chulalongkorn University
- Norwegian School of Economics and Business Administration, Norway
- Strategic CFO in Capital Markets Program (Class 4.) Thailand Securities Institute,The Stock Exchange of Thailand
- Director Certification Program (DCP) 61/2005
- Company Secretary Program (CSP) 18/2006 Thai Institute of Directors Association
Period | Position | Company Name |
2018 – Present
2012 – 2018 2013 – Present 2018 – Present | Listed Companies President Nomination and Remuneration Committee Executive Committee Vice President Director Director Other Companies Competitive Business related to Company’s Business |
Saha Pathana Inter-Holding PCL.
Saha Pathana Inter-Holding PCL. Samsung Life Insurance (Thailand) PCL. President Bakery PCL 67
|

Mr.Vorayos Thongtan
Director
- Director at January 1, 2021
- Executive Director at January 1, 2021
- Authorized Director
- Master of Business Administration, University of Texas at Dallas, USA
- Master of Science in Finance (Distinction Honor), University of Texas at Dallas, USA
- Bachelor of Electrical Engineering (Second Class Honor) Sirindhorn International Institute of Technology Thammasat University
- How to Development a Risk Management Plan (HRP) 20/2018
- Director Certification Program (DCP) 272/2019 Thai Institute of Directors Association (IOD)
- Advanced Master of Management Program (AMM) (Class 8) National Institute
- Master of Engineering Information Science,
Period | Position | Company Name |
2021 – Mar.2023 | Listed Companies Independent Director Other Companies Competitive Business related to Company’s Business |
Singer Thailand PCL.
|

Mr.Chinapat Visuttipat
Independent Director
- Independent Director at December 14, 2021
- Chairman of the Audit Comittee at December 14, 2021
- Chairman of the Corporate Governance and Risk Management Committee at May 13, 2022
- Master of Law, Thammasat University
- Bachelor of Law, Thammasat University
- Graduate Diploma Program in Business Law, Thammasat University
- Director Certification Program (DCP) 162/2012
- Directors Diploma Program (Fellow Member) 36/2013 Thai Institute of Directors Association (IOD)
- Successful Formulation & Execution of Strategy (SFE) 36/2564
- Financial Statements for Directors (FSD) 46/2022
Period | Position | Company Name |
2020 – Present 2015 – Present
2016 – Present 2021 – Present
2016 – Present
| Low and Tax Consultants Low and Tax Consultants Listed Companies Director Other Companies Competitive Business related to Company’s Business) | ONE Law Office / ONE Law Club Siam City Law Offices GP Company Limited
Origin Property PCL Origin Property PCL
Chin Huay PLC
|

Mr.Natapong Vanarat
Independent Director
- Independent Director at January 5, 2022
- Audit Commtttee at January 5, 2022
- Master of Commerce Finance , University of New South Wales /Australia
- Bachelor of Computer Science , University of New South Wales / Australia
- Director Certification Program (DCP) 318 / 2022
Period | Position | Company Name |
2021 – Present
| The Secretariat of the Cabinet Other Companies Competitive Business related | The Secretariat of the Cabinet Krungthai Card PCL.
|

Mr.Chaisak Yongbanjerd
Independent Director
- Independent Director at January 5, 2022
- Corporate Governance and Risk Management Committee at May 13, 2022
- Master of Economics, National Institute of Development Administration
- Bachelor Degree in Electrical Engineer, Prince of Songkla University
- Director Certification Program (DCP) 321/2022
Period | Position | Company Name |
2016 – 2018 | Director, Power Purchase Agreement Listed Companies Other Companies Competitive Business related | Electricity Generating Authority -None- -None-
|

Mr.Warawuth Chaipiriyapitak
Independent Director
- Independent Director at April 21, 2023
- Audit Commtttee at May 12, 2023
- Master Degree of Science, IT in Business-Accounting Information System (AIS), Chulalongkorn University
- Bachelor’s degree in accountancy – Accounting Information System (AIS), Chulalongkorn University
- Director Accreditation Program (DAP) / 2019
Period | Position | Company Name |
| Listed Companies Other Companies Competitive Business related | -None- 1
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