About Us

Management Team

Sim Mong Keang



Managing Director and CEO



As a Group Managing Director and CEO, Mr. Sim will be responsible for the strategic planning and development of the Group's business, and spearheading the expansion and growth of the Group.

Mr. Sim is the CEO and co-founder of Plexus Group. Prior to Plexus Group, he has held several sales and marketing positions in various multinational corporations in the electronics industry.

He holds a diploma in electronics engineering and a Bachelor of Commerce from Murdoch University, Western Australia.

Ng Boo Gan



Executive Director and President of Operations



Mr. Ng is the co-founder of Plexus Group and has been the vice president of operations of Plexus Group since 1998. He is responsible for the Group order fulfilment operations. During his years with Plexus Group, Mr. Ng set up the entire operation including implementing the ERP system and the warehouse logistic centre.

He graduated from Ngee Ann Polytechnic with a diploma in electrical and electronic engineering.

Kelvin Loh



VP of Finance



Mr. Loh is the Vice President of Finance for the Group and is overall responsible for the finance department of the Group supported by the Group Finance Manager. He is also responsible for management reporting and oversees the financial and internal controls of the Group. Prior to this, Mr Loh joined WesTech Group in November 2008 as the Finance Manager and assisted the CFO in the overall direction and control of the WesTech Group, including the financial and management of accounts, legal matters, credit control, internal and external auditing and finacial planning and analysis.

He has ten years of experinence in audit and holds a Bachelor of Business (Accounting) from the Queeensland University of Technology and is a member of CPA, Australia.

Johnson Ho



Chief Operation Officer (Greater China)



Mr. Ho has over 26 years of experience in the semiconductor industry, having held senior level positions in Texas Instruments Asia, Yosun Corp Ltd and Serial Microelectronics Pte Ltd.

He holds a Bachelor of Engineering degree from the National University of Singapore, and a Post Graduate Diploma in Marketing Management from the Marketing Institute of Singapore.

Wong Hot Yong



President of the Systems



Mr. Wong joined the Group since 1988 and was appointed to the Board of WesTech in May 2005. In his executive capacity, he heads the WesTech Group's systems integration business. He has secured many new value-added product lines from Japanese and American manufacturers, aiding the WesTech Group's expansion and penetration into new overseas markets.

He holds a diploma in electronics engineering as well as a sales and marketing diploma from the Marketing Institute of Singapore.