 He guided the organisation in its transition to an Australian Government Prescribed Agency on 1 July 2005.In May 2008, Parliamentary Secretary for Defence Procurement, Greg Combet announced an extension to Gumley's tenure, stating that his reappointment reflected a strong belief within the incoming Government that Gumley had been largely responsible for a significant improvement in the handling of Defence projects.Following his appointment, Gumley immediately implemented six reform themes under the slogan "change is goodness".