He signed with the North Queensland Cowboys for the 2010 and 2011 seasons. Ah Mau also played for the Mackay Cutters in the Queensland Cup.[6] His contract with the Cowboys expired at the end of the 2011 season, and he left the club having appeared in five NRL matches.[7] Isaak was involved in the 2013 Tertiary Student Rugby League World Cup playing for Australia having won the grand final 16-26 over England.