Group coaching is growing as a leadership development intervention for executives, in business schools and organizations. Benefits include economies of scale, diversity of perspectives, and behavioural change. We studied the psychodynamic group coaching intervention technique practiced at a global business school. This intervention has been experienced by thousands of senior executives for over a decade with positive results. To contribute to a robust theory of why this intervention is effective and how it works, we reviewed the literature of the critical components to analyze their efficacy.