Developing Open Source System Expertise in Europe (DOSSEE) is an Erasmus intensive programme (IP). The aim of this IP is to exchange knowledge of and experience in local methods and techniques in the field of open source software knowledge in ICT by engaging a group of international students and lecturers in a joint, explorative investigation of contemporary methods of open source software systems. In addition the program focuses on the students learning interpersonal skills, such as personal and professional skills, multidisciplinary teamwork, communication, communication in a foreign language and leadership. The target group consists of European engineering students who are interested in knowing which factors play a role in information systems and what the similarities and differences between the various national approaches in open source software systems and techniques are. The event forms a unique opportunity in promoting active learning in an international environment. Students get experience working in teams across country boundaries. In the paper we will describe the structure and our experiences from participating in this IP with relation to the CDIO initiative. Finally we draw conclusions and give our recommendations based on those.