We examine the learnability, antecedents and outcomes of career self-directedness using a longitudinal dataset of Flemish career counseling clients. The results show that the career counseling clients improved their career self-directedness during the counseling and that this improvement lasted for at least 6 months. Furthermore, we found career self-directedness to be explained in a significant way by self-awareness and adaptability, two competences identified by Hall [Hall, D. T. (1996). Protean careers in the 21st century. "Academy of Management Executive", 10(4), 8-16; Hall, D. T. (2004). The protean career: A quarter-century journey. "Journal of Vocational Behavior", 65(1), 1-13] as crucial for steering one's career. Also, career self-directedness related positively to training participation, job mobility and career satisfaction. The main implications of our findings for the protean career and the career counseling literature are discussed. (Contains 3 tables.)