The protean career concept is a widely acknowledged contemporary career model, but conceptual and empirical analysis of the model is scarce. We provide an integrative literature review of empirical research and note that the research is hampered by inconsistent use of terminology and methodological limitations. First, we show that the two protean metacompetencies—adaptability and identity—have been relatively neglected as the research has evolved. Second, we describe how preexisting protean measures are limited in covering the full range of the concept. Finally, we draw on career theory to suggest four conceptual components as a basis for future model development and offer suggestions for research that tests the utility of the protean career concept in relation to other similar constructs. Copyright © 2013 John Wiley & Sons, Ltd.