Raymundo played for Letran in the NCAA from 1997–1999 and made significant impact for the Knights alongside future PBA players Chris Calaguio and Willie Miller. From 1998-1999, he was a member of the Knights' back-to-back NCAA championships with victories over five-peat champion San Sebastian Stags and the JRU Heavy Bombers, respectively. He was named NCAA MVP in 1999. He also played for the Philippine national team in the 1999 Southeast Asian Games as the country won the gold medal.