Stefan Kruijer has more than 25 years of experience in the ICT world, ranging from software development to strategic consulting. As a freelance software developer and IT consultant, he has been focusing on sustainable digitalization and resource-efficient software development (green IT) for around 7–8 years.
In addition to his professional activities in the field of sustainable digitalization, he also volunteers for various NGOs and working groups. He is co-coordinator of the germanwide Digital Expert Group of Scientists for Future.