One of the biggest and most difficult changes for any leader is the one from an individual contributor or professional who does the work, to a manager who must continue to do the work and more importantly, leads others doing their work. It’s important for a leader’s long-term career to make that transition as quickly and successfully as possible. It’s also important for the success and sustainability of any organization. Why? First-time managers make up the vast majority of the largest population of leaders in any organization—those at the entry- or first-levels of management. They directly lead a majority of people in organizations, as much as two-thirds of the workforce. They are the pipeline for future leadership positions in the organization. And, they represent the leadership benchstrength of the organization.