 Koperberg remained on the backbench as member for the Blue Mountains.On 8 October 2010, Koperberg announced that he will not seek Labor Party endorsement or re-election at the 2011 state election citing "bruising factional fighting" and internal party politics.Following the 2011 state election that was won by the O'Farrell-Stoner Liberal/National coalition, Koperberg was appointed as chairman of the State Emergency Management Committee.