Given the central role of professional identity (i.e., collective self-esteem in this study), the authors examined whether collective self-esteem mediated or moderated relations between job dissatisfaction and client relationships in a sample of 132 professional counselors in the United States. Results indicated that collective self-esteem partially mediated the relationship between job dissatisfaction and client relationships. Furthermore, job dissatisfaction was negatively related to greater levels of private collective self-esteem, and greater private collective self-esteem was positively related to better client relationships. (Contains 3 tables.)