David Clutterbuck’s ‘Coaching the Team at Work’ (2007) was the first evidence-based book to define team coaching as a practice. We continue to work with teams across the world and to train team coaches – both external and internal to organisations – through our programs which are the worlds first accredited team coach courses. Our continued research has in recent years given rise to the first complex, adaptive systems model of team function and dysfunction (the PERILL model), giving teams and team coaches greater clarity into the complexities of team dynamics.