[1] 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.
In 1984 he attained a Doctor of Laws from the University of Augsburg with a dissertation on the subject of: "Human Rights as a Foreign Policy Goal.
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.
"[5] In April 2015 Müller became a member of the newly established Australia-Germany Advisory Group which "will work to identify opportunities for increased trade and investment, cooperation in the Indo-Pacific and other regions of the world, cultural and social links and scientific collaboration.
"[6] He was active in promoting ThyssenKrupp Marine Systems' bid for the Royal Australian Navy's Collins-class submarine replacement project.