One of the toughest transitions for leaders is progressing from a role where your value is largely driven by expertise, into a broader spanning role, which demands a different set of skills, relationships and a change in mindset about the value you add as a leader. In conversation with Wanda Wallace, author of You Can’t Know It All: Leading in the Age of Deep Expertise, we discuss how leaders can anticipate and prepare for the transitions required, and practical advice on what this means for leadership models and strategies for leadership development in our organisations.