Ronny was also the member of Malaysia U-23 team during 2003 until 2006. It was Allan Harris who took Ronny into Malaysia U-23 squad. He played in 2006 Asian Games, 2004 Olympic Games qualifier, 2003 SEA Games and 2005 SEA Games. His biggest achievement with the team is becoming the bronze medalist at the 2003 and 2005 SEA Games.