During his international career, Kronfeld played in 56 games for the All Blacks, gaining 54 test caps, including appearances at both the 1995 and 1999 Rugby World Cups.

After playing one game in 1992, Kronfeld gained a starting position in the Otago team in the National Provincial Championship (NPC) for 1993.

He played in the 1995 Rugby World Cup including the final in which the All Blacks lost a thrilling game to South Africa.

He made five appearances in the All Blacks’ 1999 World Cup campaign, which included the game against England and the amazing semi-final with France that took place at Twickenham.

From September to December 2012 Josh Kronfeld hosted the ChoiceTV show Brunch (New Zealand) for Season One with April Ieremia.