Born 1975 in Winterthur, he graduated with distinction in directing at the ZHdK. His diploma film Joshua (2002) won numerous international awards and was nominated for the Swiss Film Award as well as the European Short Mélies d’Or. In 2004 he began to deal intensively with the historical case of Klara Wendel and with the history and present-day reality of the Yenish. This resulted in, among other things, Ruäch – A journey into Yenish Europe (2023). In 2012 he founded the Cine-Club Perla-Mode in a collective with 5 artists, which invited the director of the legendary film Reisender Krieger (1981), Christian Schocher, in March 2014. From the conversation Müller had with him at the Cine-Club, the documentary portrait Christian Schocher, Filmmaker (2015) evolved, co-directed with Marcel Bächtiger. In the works are the feature film project Die Wahrheit der Klara Wendel, produced by Amka Films, as well as the Fast Track winning project Doppelganger (Doc./Fic.), which he is realizing in a collective with Silvan Hillmann and Emanuel Signer.