Dennis Andrzejewski studied medical computer science at Applied University of Brandenburg. In 2012 he became Bachelor of Science. He did his Master of Science also at Applied University of Brandenburg in Computer Science. In 2014 he became Master of Science. His thesis was about the transparent representation of medical decisions in a Workflow Management System. In his thesis he analyzed the use case tumor board, where all decisions regarding breast cancer treatment take place. Those decisions have been analyzed via structured expert interviews and have been represented with the graphical Notation DMN. After his graduation he worked at HealthyWell in Berlin. This company has the focus on patient empowerment. Since June 2015 til November 2016 he worked at Applied University of Flensburg as researcher in the Project Baltic Campus on eHealth. In December 2016 he started a new job at Segeberger Kliniken GmbH.