Management skills are very different from the skills one needs to succeed as an individual contributor. Being a manager requires skills beyond those of being an excellent worker. Managers need to focus on people, not just tasks. They need to rely on others, not just be self-reliant. Managers are also team-oriented and have a broad focus, whereas individual contributors succeed by having a narrow focus and being detail-oriented.
In many ways, transitioning from the role of an individual contributor to a manager of others is similar to the difference between being a technician and being an artist. The manager is an artist because management deals with nuance and ambiguity, which involves a different mindset.
New managers need support and encouragement as they navigate the transition from being part of the group to leading the group. Skill Builders specializes in training and coaching for new managers.