They also adversited for their opening positions in Straits Time for last few weeks from Jan. You may also try to register your own search agent in Monster.com.sg and Hudson.com.sg.
PWC, KPMG and Deloitte are expanding this year worldwide, in Singapore, in Japan, in China, and even in Europe. They have some openning positions in Q1 and Q2. It is a bit late to tender for these positions after March, while nothing is too late. They do prefer good academic results for fresh graduates; anyway, just write an excellent resume to show off your skils/exp and try your luck.