A master's-prepared nurse in an introductory role as a CNS will find the experience both challenging and rewarding. The CNS's first year is a time of self-exploration, stimulation, ambivalence, and growth, both professionally and personally. These nurses are often experienced clinicians who strive to be in positions in which they can affect a large group of patients and colleagues with both their knowledge and expertise. Stress occurs because the experienced nurse who has felt competent, confident, and comfortable in his or her previous role as a direct caregiver is now in the role of novice CNS who must learn the expectations and responsibilities of a new role, and develop a broad set of new skills. Utilizing the Dreyfus model, as applied to the nursing profession by Benner, this article will explore the transition of the nurse from experienced staff nurse to novice CNS. Enhancing and restraining factors that influence role realization, as well as effectiveness in supporting staff, to achieve optimal outcomes for patients will be identified.