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Organization Structure

Organization Structure

Board of Directors

Dr.Phornthep Phornprapha

  • Current Position

Director and Honorary Chairman

  • Work Background
  • Present : Chairman of Companies within the Siam Motors Group, such as ;
  • Chairman, Siam Motors Co., Ltd.
  • Chairman, Siam Daikin Sales Co., Ltd.
  • Chairman, NSK Bearings (Thailand) Co., Ltd.
  • Chairman, Bangkok Komatsu Co., Ltd.
  • Chairman, Nittan (Thailand) Co., Ltd.
  • Chairman, Siam Music Yamaha Co., Ltd.
  • Chairman and Director, Siam-Hitachi Elevator Co., Ltd.
  • Chairman and Director, Hitachi Elevator (Thailand) Co., Ltd.

Mr. Prakasit Phornprapha

  • Current Position

Director and Chairman of the Company

  • Work Background
  • Present : Chairman, President and Executive Director of Companies within the Siam Motors Group, such as ;
  • 2010 – Present : Chairman, GS Yuasa Siam Sales Ltd
  • 2004 – Present : President, Siam Motors Co., Ltd
  • 2004 – Present : President, Siam GS Sales Co., Ltd.
  • 2011 – Present : Executive Director, NSK Bearings Manufacturing (Thailand) Co., Ltd.
  • 2016 – Present : Director and Executive Director, Siam-Hitachi Elevator Co., Ltd.
  • 2018 – Present : Director and Executive Director, Hitachi Elevator (Thailand) Co., Ltd.
  • 2022 – Present : Director, Nissan Motor (Thailand) Co., Ltd.

Mr. Victor Sia Tuck Seng

  • Current Position

Director and President

  • Work Background
  • 1988 : Joined Hitachi Elevator Engineering (S) Pte. Ltd.
  • 2007 : General Manager, Hitachi Asia Ltd.
  • 2013 : President, Hitachi Elevator Philippines Corporation
  • 2020 : Managing Director, Hitachi Elevator Asia Pte. Ltd.
  • 2022 : Asia Head & CMO, Building Systems Business Unit, Hitachi, Ltd. Director, Hitachi Elevator (Thailand) Co., Ltd.
  • 2022 : Asia Head & CMO, Building Systems Business Unit, Hitachi, Ltd. Director, Hitachi Elevator (Thailand) Co., Ltd.
  • 2025 : Asia Head, Urban Systems Business Unit, Hitachi, Ltd.

นายฉัตรชัย เล้าตระกูล

  • Current Position

Director and Managing Director

  • Work Background
  • 1996 : Joined Siam NSK Steering Systems Co., Ltd.
  • 2013 : Managing Director, Siam NSK Steering Systems Co., Ltd.
  • 2018 – Present : Joined Siam-Hitachi Elevator Co., Ltd. as Director and Managing Director
  • 2024 – Present : Joined Hitachi Elevator (Thailand) Co., Ltd. as Director and Managing Director

Mr. Noriharu Amiya

  • Current Position

Director

  • Work Background
  • 1992 : Joined Hitachi, Ltd.
  • 2019 : General Manager of Management Planning Office, Strategy Planning Div., Hitachi, Ltd.
  • 2022 : Vice President & Executive Officer, Deputy CEO and Head of Japan Business of Railway Systems Business Unit, Hitachi, Ltd.
  • 2024 : Vice President & Executive Officer, CEO of Building Systems Business Unit and Deputy General Manager of Connective Industries Div., Hitachi, Ltd. / President & CEO of Hitachi Building Systems Co., Ltd.
  • 2024 – Present : Director, Hitachi Elevator (Thailand) Co., Ltd.
  • 2025 : Senior Vice President & Executive Officer, COO of Connective Industries Sector and CEO of Urban Systems Business Unit, Hitachi, Ltd.

Mr. Takeshi Yamamoto

  • Current Position

Director

  • Work Background
  • 1984 : Joined Hitachi Building Systems Co., Ltd.
  • 2021 : General Manager, Business Planning Div., Building Systems Business Unit, Hitachi, Ltd. Director and General Manager, Business Planning Div., Hitachi Building Systems Co., Ltd.
  • 2023 : COO, Deputy Japan Head & General Manager, Domestic Business Management Div., Building Systems Business Unit, Hitachi, Ltd. Hitachi Building Systems Co., Ltd.Managing Director and General Manager, Domestic Business Management Div.,
  • 2023 – Present : Director, Hitachi Elevator (Thailand) Co., Ltd.
  • 2024 : COO, Deputy Japan Head & General Manager, Domestic Business Management Div., Building Systems Business Unit, Hitachi, Ltd. Vice President, Domestic Business Management Div., Hitachi Building Systems Co., Ltd.
  • 2025 : COO & Japan Head, Urban Systems Business Unit, Hitachi, Ltd. President & CEO, Hitachi Building Systems Co., Ltd.

Mr. Tatsuhiro Koguchi

  • Current Position

Director

  • Work Background
  • 1983 : Joined Hitachi Building Systems Co., Ltd.
  • 2019 : Branch Manager, Kanto Branch, Hitachi Building Systems Co., Ltd.
  • 2023 : Branch Manager, Kansai Branch, Domestic Business Management Div., Hitachi Building Systems Co., Ltd.
  • 2024 – Present : Director and Branch Manager, Kansai Branch, Domestic Business Management Div., Hitachi Building Systems Co., Ltd.
  • 2025 : Director, Hitachi Elevator (Thailand) Co., Ltd.

Mr. Motofumi Suzuki

  • Current Position

Director

  • Work Background
  • 2003 : Joined Hitachi, Ltd.
  • 2019 : Manager of Business Planning Dept, Hitachi Building Systems Co., Ltd.
  • 2022 – 2024 : Senior Manager, Hitachi Elevator Asia Pte. Ltd.
  • 2025 : Director and Deputy Managing Director, Siam-Hitachi Elevator Co., Ltd.
  • 2025 : Director, Hitachi Elevator (Thailand) Co., Ltd.

Mr. Prasert Chiamcharoen

  • Current Position

Director

  • Work Background
  • 2016 : Joined Bangkok Komatsu Forklift Co., Ltd.
  • 2020 : Assistant Managing Director, Bangkok Komatsu Forklift Co., Ltd.
  • 2021 : Joined Siam Motors Parts Co., Ltd. as Finance & Accounting General Manager Joined Siam Yamaha Motors Robotics Co., Ltd. as Managing Director Joined Siam Smart Solutions Co., Ltd. as Director
  • 2024 – Present : Joined Hitachi Elevator (Thailand) Co., Ltd. as Director and Senior General Manager, Account & Finance Div.

นายคาซึมิ ซากาชิตะ

  • Current Position

Director

  • Work Background
  • 2007 : Joined Hitachi, Ltd.
  • 2013 : Manager, Financial Div., Urban Planning & Development Systems Company, Hitachi, Ltd.
  • 2020 : Manager, Finance Div., Hitachi Building Systems Co., Ltd.
  • 2022 – Present : Director and Cost & Financial Advisor, Siam-Hitachi Elevator Co., Ltd.
  • 2024 – Present : Director, Hitachi Elevator (Thailand) Co., Ltd.
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