Prosser was born in Bunbury, Western Australia,[1] and was a self-employed businessman and company director before entering politics.
[1] On the basis of Liberal prime minister John Howard's 1996 Guide on Key Elements of Ministerial Behaviour, Prosser was forced to return to the backbench July 1997 because of improper business dealings.
He continued to be a major retail landlord, and this was seen to conflict with his responsibilities as Minister for Small Business and Consumer Affairs.
[6] The paper also alleged that Prosser was recently seen dining with Julian Grill, Burke's business partner.
[7] In August 2011 he was elected president of the Western Australian division of the Liberal Party, succeeding Barry Court.