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Karl Gierach is a seasoned data science professional with extensive experience in various roles over the past two decades. Currently serving as Principal Data Scientist and Associate Director at HelloFresh since October 2022, Karl specializes in Marketing Science Applications, focusing on Bayesian Statistical Models and Machine Learning. Previously, Karl held the position of Principal Data Scientist at Innovid, managing a team within the Advanced Measurement Group and addressing challenges in the Connected TV space. Karl's earlier roles include positions at Conversion Logic and CAKE, where leadership of data science teams and development of algorithms to enhance online advertising effectiveness were key responsibilities. Karl's background also includes software engineering positions at SourceThought, Spireon, Ortiva Wireless, AVST, and Encyclopaedia Britannica. Karl earned a Master of Science in Computer Science from the University of Illinois Chicago in 2000.