Today's organizations are undergoing constant and substantial change due to many internal and external forces. These changes are impacting on the inter- and intra-organizational career mobility of managers and employees. This research assessed the relationship between career mobility history and a recent internal or external job change on organizational commitment using (Allen & Meyer, 1990) three-dimensional model. Professional-level employees participated in three survey administrations over an 18-month time frame. External career mobility history (i.e., number of external job moves over one's career) was negatively related to normative commitment, but not to affective and continuance commitment. Affective and continuance commitment were significantly lower for external movers prior to a move when compared to nonmovers over the same period. In contrast, only continuance commitment was significantly lower for internal movers prior to a move when compared to nonmovers over the same period. Affective commitment increased significantly after the move for both internal and external movers. Implications for research with respect to career mobility and organizational commitment are discussed.