Management Team

Walter Sousa | Executive Chairman
Koh Boon Hwee | Executive Director
Khaw Kheng Joo | CEO
Yvonne Kwek | CFO
William Tan | Sr.VP Sales & Marketing (VoizNet)
Nah Chin Gek | Sr.VP Operations & Engineering

Technology Division
Christopher Koh | VP Sales (Worldwide) - Contact
Martin Neilsen | Sr Director Sales (Europe) - Contact
Kevin Havre | Sr Sales Manager (Americas) - Contact
Kaushik Patel | Director of Product Marketing (Worldwide) - Contact
Ow Sin Ming | Head - Engineering

Board of Directors


Walter Sousa

Mr Sousa joined the Board in October 1999 and was appointed Executive Chairman of the Company in September 2001. Previously Mr Sousa was the Chairman and Chief Executive Officer of AT&T Asia/Pacific and has also been involved in private equity investments. Prior to his appointment at AT&T Asia/Pacific, he was the Chief Operating Officer of London Stock Exchange-listed Astec (BSR) PLC where he was responsible for its worldwide operations. Mr Sousa was the President of Hewlett Packard Far East in Hong Kong from 1985 to 1991. He holds a Masters degree in Public Administration from an American University.

Koh Boon Hwee

Mr Koh joined the Board in April 1998 and was appointed an Executive Director of MediaRing on 1 February 2002. He is currently the Chairman of Singapore Airlines Ltd and Chairman of the Nanyang Technological University Council. His major appointments previously were Chairman of the Singapore Telecommunications Group & its predecessor organisation (1986-2001), Executive Chairman of the Wuthelam Group (1991-2000), Chairman of Omni Industries Ltd (1996-2001) & Managing Director of Hewlett-Packard Singapore (1985-1990) where he started his career. Mr Koh holds a Master in Business Administration degree (with Distinction) from Harvard Business School.

Khaw Kheng Joo

Mr. Khaw joined the Board in February 2002. He was appointed the Chief Executive Officer on 1 November 2002. Mr. Khaw was previously President of Omni Electronics (2000-2001), a wholly owned subsidiary of Omni Industries Ltd. Omni Industries was listed on the Stock Exchange of Singapore and was one of the largest electronic contract manufacturers in Asia; prior it's being acquired by Celestica Inc in 2001. After the acquisition, Mr. Khaw joined Celestica Inc as their senior VP.

Prior to Omni Electronics, Khaw spent 26 years (1973-1999) at Hewlett Packard in a number of positions. His last assignment there was the General Manager of the Pocket PC Division. The Division was chartered to build the HP's Pocket PC business, based on Window CE OS.

Khaw is currently on the board of Total Automation, a listed company in Singapore as well as Senoko Power. He is also a member of the advisory council for the business school of Singapore Polytechnic. He served for a year on the board of EDB (2001-2002).

Mr. Khaw holds a Bachelor of Science degree in Electronic and Computer Engineering from Oregon State University, Oregon and a Master of Business Administration from Santa Clara university, California.

Yvonne Kwek

As Chief Financial Officer of MediaRing, Mrs. Kwek heads the company's Corporate Finance and Human Resource functions. Prior to her appointment at MediaRing, Yvonne was Managing Director, Corporate Finance in the Internet Technology Group Ltd and also Executive Director in the Crimson Funds, a US$450million Asian Fund. At Singapore Telecommunications Ltd, Singapore's leading Telecommunications provider, Yvonne held the position of Vice President (Corporate Finance) when it was listed on the Singapore Stock Exchange. Yvonne graduated from the Singapore University with a Bachelor of Accounting degree in 1975.

William Tan

Mr. Tan joined MediaRing Limited in 1997 and is currently the Senior Vice-President of Sales and Marketing (VoizNet Services). Prior to his appointment, Mr Tan was the Managing Director of PK Electronics Pte Ltd, a manufacturer of uninterruptable power supplies, where he was responsible for its Asian sales and operations. From August 1992 to May 1997, Mr Tan was the General Manager of Ingram Micro, Inc., one of the world's largest wholesale and distributor of information technology products. In this role, he was responsible for its Singapore operations as well as export sales to the Asian region. From 1989 to 1992, Mr Tan was with Pacific Technology Pte Ltd, a local distributor of information technology products, where his last held position was Marketing Manager. Mr Tan holds a Diploma in Marketing from the Chartered Institute of Marketing in Singapore.

Nah Chin Gek

As the Senior Vice President of Operations and Engineering, Mr Nah is responsble for the planning, development and operation of Mediaring's global VoIP network for provision of basic and enhanced voice services. Prior to joining Mediaring in April 2002, he was the Senior Director responsible for the planning and development of Singapore Telecom's global network using both traditional as well as the next generation IP-based switching technology for global voice servcies. He has extensive experience in voice services including an overseas stint in Norway for the start up of Singapore Telecom's wireless GSM joint venture company. He holds a Bachelor of Engineering (Hon) from the University of Singapore in 1977.