Career development (CD) has long been cited as a core area associated with human resource development (HRD). Despite this explicit connection, few publications focusing on CD are available in general HRD-related literature. This review outlines selected theories, examines selected definitions of CD, and analyzes the aims of career development in relation to HRD. The authors argue that there is much more opportunity to explore CD as a necessary component of HRD than has been undertaken to date. Furthermore, they make recommendations for multilevel integration and related theory-building approaches that may enhance the role of CD in HRD. (Contains 3 tables.)