Professor Jonker’s research interests are explicitly developing strategies for sustainability and circularity related to new business concepts and business models. Within this focus, he explores how to shape systemic change and transformation leading to organising (inter) organisational sustainability. Thus far, he has written and co-written 35 books, published over 150 articles and provided numerous contributions to blogs, talk shows and radio programs. For seven years (2009 -2015), he was nominated on the Top 100 list of most influential ‘green’ people’ in the Netherlands.