This special issue on leadership development contains six articles that bring cutting edge science and practice in leadership to consulting psychologists working in organizations. The purpose is to focus on leadership development from diverse perspectives, thus educating us all. The articles are authored by a range of academic researchers and psychological practitioners with the aims of being both practical and educational to consulting psychologists, while avoiding a prescriptive or "cookie-cutter" approaches. The special issue is directed toward thoughtful consulting psychologists and students of consulting psychology who may draw on cutting edge knowledge, science, and practice while adapting, tailoring, and applying the content in these papers in the service of clients or in the service of advancing their own knowledge and mastery of our field.