Board of Directors
Mr. Vanchai Tosomboon
Positions:
Chairman of the Board, Authorized Director, and Member of the Nomination and Remuneration Committee
Age
76 years
Nationality
Thai
Date of Appointment
April 21, 1999
Education and Training
- Master’s Degree in Business Management, Asian Institute of Management
- Bachelor’s Degree in Law, Thammasat University
-
Certificate: Thai Institute of Directors (IOD)
- Director Certification Program (DCP), Class 7/2001
- Director Accreditation Program (DAP), Class 7/2004
- Advanced Audit Committee Program (AACP), Class 19/2015
- Corporate Governance for Capital Market Intermediaries (CGI), Class 10/2015
- Board Nomination and Compensation Program (BNCP), Class 9/2020
- Role of the Chairman Program (RCP), Class 52/2022
- Managing Corporate Resources, International Institute for Management Development (IMD), Switzerland, 2000
- Breakthrough Program for Senior Executives, International Institute for Management Development (IMD), Switzerland, 2002
- Senior Management Program, International Institute for Management Development (IMD), Switzerland, 2006
Skills and Expertise
Leadership, Law, Governance/Compliance, Marketing, Construction Materials
Directorship Information
Period of Directorship
Holding the position of director since 1999 until present for a total of 26 years and 8 months
Shareholding in the Company as of December 31, 2025
760,000 shares or 0.145 percent of all shares with voting rights
Direct and indirect interests in any business with the Company and its subsidiaries
None
Family Relationship with Executives
None
Number of Director Positions in other Business
Listed Company: None
Non-Listed Company: None
Non-Listed Company: None
Past 5-Year Work Experience
2014 – Mar 2024
Member of the Nomination and Compensation Committee, Siam City Cement Public Co., Ltd.
2004 – Mar 2024
Director, Siam City Cement Public Co., Ltd.
2015 – Apr 2023
Director, Chip Mong Insee Cement Corporation (Registered in Cambodia)
2014 – Sep 2023
Independent Director and Audit Committee Member, Krungsri Securities Public Co., Ltd.
2012 – 2021
Consultant, Siam City Cement Public Co., Ltd.
2014 – 2020
Member of Governance Committee, Siam City Cement Public Co., Ltd.
2017 – 2019
Director, Siam City Cement (Vietnam) Limited (Registered in Vietnam)
2016 – 2019
Director, Siam City Cement (Lanka) Limited (Registered in Sri Lanka)
2004 – 2011
Director and Executive Vice President (Saraburi Operation), Siam City Cement Public Co., Ltd.
2002 – 2016
Director, Conwood Co., Ltd.
2004 – 2005
Chairman of the Board, Karat Faucet Co., Ltd.
1999 – 2005
Managing Director and Chairman of Executive Board, Royal Porcelain Public Co., Ltd.
1999 – 2004
Managing Director, Diamond Roofing Tiles Public Co., Ltd.