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Andrei Nemilentsau is a Senior Data Scientist specializing in NLP at Pie Insurance, where responsibilities include developing LLM and genAI capabilities for extracting knowledge from insurance documents. Previously, at Rocket Companies, Andrei served as a Staff Data Scientist, utilizing LangChain and LLMs for mortgage-related question answering tools, and also led data science teams in creating enterprise machine learning solutions. Andrei's earlier experience at Quicken Loans included developing predictive models for loan processing times and employing deep learning techniques for targeted advertising strategies. Academic involvement includes research positions at the University of Minnesota Twin Cities, University of Wisconsin Milwaukee, and Lehigh University, with a foundational educational background in Theoretical and Mathematical Physics, including a Ph.D. from Belarusian State University.