القيادة العليا للجيوش الألمانية
When General Erich Fellgiebel and then his deputy Fritz Thiele were arrested and subsequently executed for their roles in the 20 July plot, Praun was appointed to succeed them on 1 November 1944 as Chief Signals Officer at the Oberkommando der Wehrmacht and Oberkommando des Heeres and was promoted to General der Nachrichtentruppe.