Udo Sonnenberg founded elfnullelf GmbH in 2013. From 2009 to 2012, he was involved in the start-up phase of elfnullelf and was co-owner. His thematic focus is on the areas of planning/building, the healthcare industry, and the energy and mobility transition. He also writes on these topics in the elfnullelf “Politikfeldmonitor“. Before moving into consulting, he was, among other things, association managing director for the DAI Verband Deutscher Architekten- und Ingenieurvereine e.V. (Association of German Architects and Engineers), whose business he has been managing since 2008, as well as senior consultant for a political strategy consultancy in Berlin.
As an alumnus of the KU-Eichstätt-Ingolstadt, he gave a seminar there on the topic of “Lobbying in the area of conflict between representation of interests and democratic legitimation”, among other things. He started his professional career as a research assistant in the German Bundestag and accompanied the move of the parliament from Bonn to Berlin.