 In 1955, Müller worked on agricultural themes at the agricultural collective (LPG) in Eismannsdorf.In 1957, he produced tempera works in the Gronau salt and potash shaft in Bernburg.In 1958, he spent a period working in the engineering works in Halle, where he produced an oil painting known as „Der Maschinenformer“ (the engine builder), now owned by the Moritzburg foundation at the Kunstmuseum des Landes Sachsen-Anhalt (State Art Museum of Saxony-Anhalt) in Halle.