Career
He failed but garnered a respectable 47.6% of the votes against the veteran. He contested again in 2006 against Chiam but could only get 44.2% of the votes. In 2011, Chiam who had been ruling Potong Pasir for 27 years left to contest in the Bishan-Toa Payoh Group Representation Constituency.
As a result, Sitoh contested against Lina Chiam (Lina Loh Woon Lee) who is the wife of Chiam See Tong instead during his third attempt.