According to her website: "In December 2005, Justine was appointed as a Vice Chairman of the Conservative Party, with responsibility for youth. In July 2007, she was appointed as a Shadow Minister for the Treasury and then in January 2009, she was appointed Shadow Minister for Communities and Local Government with responsibility for London by David Cameron.
Following the Election in May 2010, Justine was appointed as the Economic Secretary to the Treasury within the Coalition Government. In October 2011, Justine was then appointed to the role of Secretary of State for Transport.
In September 2012, Justine was appointed by the Prime Minister, David Cameron, to the role of Secretary of State for International Development."