Mr Don Tan, Sin Heng Heavy Machinery managing director; Mr Tan Ah Lye, founder of Sin Heng Heavy Machinery; Mr Elvin Koh, Samwoh Corporation managing director; and Mr Ong Tiong Siew, managing director of Ryobi Kiso, are honoured at the annual Enterprise 50 Awards gala dinner held at the Raffles City Convention Centre on 2 November 2009.