 Rann was appointed Chair of Low Carbon Australia Pty Ltd in early 2012, the federal government's "green bank" providing finance to companies to reduce carbon emissions and to the International Leadership Council of The Climate Group.Rann was announced on 23 August 2012 as the next Australian High Commissioner to the United Kingdom.Rann also assumed the role of Permanent Representative to the United Nations International Maritime Organisation, Commonwealth War Graves Commissioner and Trustee of the Imperial War Museum.