We met up with Klaas Bollhoefer in Berlin. Klaas works as a Data Scientist & Big Data Evangelist with The unbelievable Machine Company GmbH. He is father of the Data Science Day (DSDay), coordinator of the Big Data Week 2013 in Berlin, member of several program committees for Big Data / Data Science conferences in Europe, author & speaker. Before that he worked as a freelance creative consultant, scrum master & manager, director user experience and as a senior IT project manager for well-known internet agencies. Side projects include: lecturer at several universities (in Berlin, Cologne, Siegen) on agile project management, creative leadership & social data. Klaas is interested in punk music, brilliant ideas, world travels and silence.