To determine the importance of career management behavior (CMB) for organizational outcomes, this study investigated the impact of CMB and organizational support for career development (OSCD) on subjective career success (SCS) and eventually on organizational commitment. Based on survey data from 355 employees of large Korean manufacturing firms, we found that both CMB and OSCD were positively associated with SCS. The results show that SCS positively affects organizational commitment and positively mediates both the relationship between CMB and organizational commitment and the relationship between OSCD and organizational commitment. Our findings imply that employee career success, which is affected by individual and organizational efforts, contributes to the outcomes of the organization in which employees are embedded.