This book defines four critical stages needed by individuals with technical or specialist backgrounds to move into leadership positions. At the core are four specific roles defined in terms of skill sets and competencies. The book is a roadmap for professional development that, at each stage, delineates 1) the unique changes required in thinking and perspective taking and 2) the behaviors leaders need to acquire and those they need to let go. The book is a pragmatic approach with tools and techniques to develop leadership where it counts the most- on the job. Inside, the authors details what is ideally suited for technical professionals or leaders in technical organizations looking to develop the leadership behaviors distinct from technical expertise. The broad application of concepts and techniques also makes this book appealing to leaders charged with improving performance at a functional or organizational level. While the concepts and principles are directed toward on-the-job application, the book can also serve as an organizational and leadership development resource for Executive MBA or in-house leadership development programs