Head of Department at German Aerospace Center (DLR). Research fields include reproducible and open data science, distributed systems, provenance, machine learning, and information visualization. Co-founder of Medando, a startup that develops mobile apps for personalized medicine and self-tracking (Quantified Self). Co-Founder of Quantified Self Meetup Cologne. Chair of PyHPC and PyData Cologne. ♥ Python and my dog Baldo.