Career
He has been in the service of the German Foreign Office since 1981 and has served previously as Ambassador to Peru from 2006 to 2011. Born in Herrsching am Ammersee in Bavaria on 20 December 1950, after school education he received his National Service training as a reserve officer with the Gebirgsjäger division from 1970 to 1972. After graduating in law from the Universities of Augsburg and Munich, in 1980 Müller was awarded a Master of Arts from the Fletcher School of Law and Diplomacy at Tufts University in Medford, Massachusetts.
The example of American politics in the years 1973-1980."
In 1981 he entered the German Foreign Office and received his first posting to the Permanent Mission of Germany to North Atlantic Treaty Organization in Brussels from 1983 to 1985.
Returning to Bonn, Müller was posted to the Arms Control Directorate from 1985-1987, before being posted to the German Embassy in Beijing, China from 1988 to 1990. In 1990 Müller became the Deputy Head of the German Delegation to the Conference on Disarmament in Geneva and was involved in negotiations to finalise the Chemical Weapons Convention in 1993.
In 1993 Müller returned to the Foreign Office in Bonn to be Deputy Head of the Public International Law Division and in 1996 was sent to Harare, Zimbabwe, to become the Deputy Chief of Mission of the embassy there. In 1998 he was sent on to New Delhi as the head political officer until 2000 when he was sent back to Germany to the new Foreign Office headquarters in Berlin to manage the South Asia Desk and Task Force on Afghanistan.
He worked there until 2006 when he received his first high-level posting as Ambassador to Peru.
lieutenant was as Ambassador that Müller hosted Chancellor Angela Merkel during her visit to Peru from 15–17 May 2008. In September 2011, Müller was appointed Ambassador to Australia and succeeds Michael Witter, who was made ambassador to Morocco. As ambassador to Australia, he receives non-resident accreditation for Papua New Guinea, Vanuatu, Nauru and the Solomon Islands.