Board of Directors

Mr. Udomdech Prurapark

Chairman of the Board

Experience:

Assistant Rector, Prince of Songkla University
Assistant to Deputy Chief Executive Officer, IRPC Public Company Limited (PTT Group affiliate)
Managing Director, Human Resources Management Company Limited

Mr. Udomdech Prurapark

Chairman of the Board

Business leadership:

Chairman of the Board, working alongside his son Assoc. Prof. Dr. Ruktai Ace Prurapark (energy specialist and Chief Executive Officer). Former Chairman of the Rayong Provincial Industry Council (representing the TPI Group).

Human resources (HR):

Former Assistant Chief Executive Officer / Assistant to Deputy Chief Executive Officer, Human Resources, IRPC Public Company Limited.

Education:

Former Assistant Rector for Student Affairs, Prince of Songkla University, Hat Yai Campus.

Mr. Thibet Rungrojkitiyos

Director

Experience:

Executive Director, P.C.S. Machine Group Holding Public Company Limited

Mr. Thibet Rungrojkitiyos

Director

No. 2 major shareholder of PCSGH:

Mr. Thibet holds 230,170,000 shares, or 15.09% of total shares outstanding (latest data as of May 2026).

Family structure:

Son of Mr. Siripong Rungrojkitiyos and Mrs. Wanna Ramanachai, founders and senior executives of the P.C.S. Group. He received the aforementioned shares transferred from his mother in 2016 as part of an intra-family shareholding restructuring.

Management background:

Former director and executive director of PCSGH before resigning as director in early 2022, while remaining one of the major shareholders together with siblings in the Rungrojkitiyos family.

Other roles:

Director of a company listed on the LiVE Exchange.

Associate Professor

Dr. Ruktai Ace Prurapark

Director / Chief Executive Officer

Experience:

Special Lecturer, Chulalongkorn University Petroleum and Petrochemical College
Independent Director, RPCG Public Company Limited

Dr. Ruktai Ace Prurapark

Director / Chief Executive Officer

Energy business leadership:

Senior executive at ETTH26, focused on renewable energy including solar power and liquefied natural gas (LNG), with a goal to list the company on the mai stock exchange by 2027.

Energy specialist:

Frequently invited as an expert to share views on global oil markets, Thailand's energy structure, support for the transition to electric vehicles (EV), and energy storage systems for national economic security.

Ms. Kanvara Tatham

Director

Experience:

Company Secretary, ITNS (International Network System Public Company Limited)

Mrs. Piyathida Prurapark

Director

Experience:

Director, SERENENESS ENTERPRISE CO., LTD.