Previously he was the national secretary of New Zealand 's largest trade union , the Engineering , Printing and Manufacturing Union ( EPMU ) , and he was President of the Labour Party from 2009 to 2011 .
He has been a Labour Member of Parliament since 2011 .
Previously he was the national secretary of New Zealand 's largest trade union , the Engineering , Printing and Manufacturing Union ( EPMU ) , and he was President of the Member of Parliament   from 2009 to 2011 .
He has been a Labour Member of Parliament since 2011 .