Hesitating between history and law, Christoph Brüll finally allowed his lifelong passion for analysis – “essential for an historian’s work” – and his curiosity to understand the “whys of a situation” to tip the balance in favour of history. As it was previously indispensable for any university career, this native of Eupen had to first go back to school ... to learn French. After a degree in history at the University of Liège in 2001, completed with a dissertation devoted, even at this early stage, to German units in the Belgian army in the interwar period and an advanced degree in higher secondary teaching the following year, in 2003 Christoph Brüll completed a DEA graduate degree in international relations and European integration. Between 2003 and 2005 he obtained a research grant from the German Office for University Exchanges (DAAD) at the Ruhr-Universität Bochum. Due to his mastery of French and German, he rapidly became one of the few Belgian researchers capable of using German texts and he obtained a Doctorate in Philosophy (PhD), specialising in contemporary history, at the Friedrich-Schiller University in Jena (Germany). His thesis on relations between Belgium and Germany in the 1944-1958 period was to be published by a German publishing house. Until 2009 his time was split between research and teaching in a linguistic immersion project at the Saint-Joseph Institute in Welkenraedt. In October 2009 Christoph Brüll became head of research at the FRS-FNRS and from May to July 2010 he will be take up the position of guest researcher at the JenaCenter for 20th Century History at the University of Jena. Following his favourite themes, the young researcher is currently preparing a post-doctoral project (“Entre Weimar et Bonn: Ruptures et continuités de la ‘Westforschung’ allemande (1920-1960)” [_“Between Weimar and Bonn: ruptures and continuities in the German ‘Westforschung’ (1920-1960)”_]), devoted to scientists and civil servants who justified interwar German hegemony and the transformation in their discourse during the 1950s and 60s. The research focuses on the network around Franz Thedieck, the jurist and civil servant responsible for the VDA in the 1920s and 30s, member of the Belgian military administration in Brussels, close to the Belgian Catholic environment and secretary of the government state of Adenauer between 1949 and 1964. This biographical axis was to lead to a sociological and intellectual approach to the phenomenon of continuity of careers and projects during the phases of the regime change.