Marc has been working in software development since the mid-90s. He worked in different roles, started as developer, took over project coordination, led teams and, after adopting agile in 2006, he has been working as product owner or agile coach. Since his first participation of the XP Conference in 2011 in Madrid, he attended all subsequent XPs. In 2011 he was one of the main organizers of the first ALE unconference in Berlin with 230 participants from all over Europe.