Simplify the following text for a Grade 7 native English-speaking person.
Original: Colin James Barnett ( born 15 July 1950 ) , Australian politician , is the leader of the Western Australian Liberal Party , the 29th and current Premier of Western Australia since the 2008 election and served as the Treasurer of Western Australia in 2010 .
Simplified: Colin James Barnett ( born 15 July 1950 ) is the 29th Premier of Western Australia .