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Theresa Berthelmann possesses extensive experience in product strategy and media optimization, currently serving as Lead Product & Strategy at PIA Advertising since August 2018. Previous roles at PIA included Senior Manager Media Optimization and various managerial positions. Prior to PIA, Theresa worked at Statista as an Analyst in Digital Markets and as a Junior Researcher. Experience also includes a position as a research assistant at the Institut für Arbeitsmarkt- und Berufsforschung and a student assistant role in mathematics during studies at Universität Paderborn. Educational qualifications include a Master of Science in International Business Studies from FAU Erlangen-Nürnberg and a Bachelor of Arts in the same field from Paderborn University, complemented by an academic tenure at the University of Lille 1 Sciences and Technology.