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Dr. Thorsten Siess joined Abiomed in 2005 upon its acquisition of Impella CardioSystems, AG, which he cofounded in 1998 and has served as manager of R&D, then chief technology officer. His work in the development and marketing of the Impella 2.5® heart pump and Impella 5.0® heart pump in Europe led to their CE Mark approval. During his time at the University of Aachen he developed the Impella® technology which serves as a platform for the entire Impella product portfolio. Prior to founding Impella, Dr. Siess served as scientist in the biomedical technology team at Helmholtz-Institute of Biomedicine at the University of Aachen. Dr. Siess received a PhD as well as his MASc in mechanical engineering from the University of Aachen.