 Sim continued the diversification of Keppel that was initiated by his predecessor George Edwin Bogaars into other fields like engineering, property, financial services as well as developing shipyards in other parts of the world.As Sim and his wife Jeanette were avid golfers, Sim was also the founding chairman of Tanah Merah Country Club.In October 2007 his illness took a turn for the worse, and had to undergo chemotherapy.