He competed at the 2008 and 2012 Summer Olympics[1][2] and represented Australia at the premier world class regattas over a fifteen-year period from 1999 to 2014.

From 2002 to 2010 Beltz was selected to represent Tasmania in the men's lightweight four contesting the Penrith Cup at the Interstate Regatta within the Australian Rowing Championships.

He raced with Alastair Isherwood in a lightweight coxless pair at the World Rowing Cup IV and then at the 2001 World Rowing Championships in Lucerne he finished in tenth place in the pair with Isherwood and in sixth place in the men's lightweight eight.

[6] 2004 saw Beltz selected in the Australian senior lightweight eight and he won a bronze medal at the 2004 World Rowing Championships in Banyoles.

[6] At Gifu, Japan 2005 he raced in the lightweight double scull with Cameron Wurf and finished in overall twelfth place.

[6] Beltz took time off after the Olympics but back in representative contention on 2010 and selected in the lightweight coxless four who contested two World Rowing Cups in Europe.

Beltz thus won his first senior world championship title, twelve years after first racing in Australian representative colours.