Geoff Miller

Walter Geoffrey Thomas Miller (25 October 1934 – 14 January 2026) was a senior Australian public servant and diplomat, best known for heading the Office of National Assessments between 1989 and 1995.

Life and career Miller was the Tasmanian Rhodes scholar in 1956, and went on to graduate from the University of Oxford.

In 1989 Miller was appointed head of the Australian Government's intelligence assessment agency, the Office of National Assessments. His tenure at the office, between 1989 and 1995, coincided with the first Gulf War, the dissolution of the Soviet Union and the beginning of the Yugoslav Wars; and he oversaw intelligence assessment analysts working on developments in these regions as well developments relating to Australia's commitment to United Nations peacekeeping.

In 1995, Miller was appointed Australian High Commissioner to New Zealand, to commence in January 1996.

Miller died in Canberra on 14 January 2026 aged 91.