Mafileo debuted for Tonga in the 1995 Rugby World Cup, playing only against Ivory Coast, at Rustenburg. He also played for Tonga Sevens in the first Rugby World Cup Sevens in 1993 and for Japan Sevens in the 2001-02 World Sevens Series. His last international cap for tonga was during the match against Fiji, at Nadi, on 4 July 2003.