A model illustrating the relationship between mentoring and job competency was developed and tested in a sample of 82 members of a local chapter of a national association for training and development professionals. Human capital was conceptualized in terms of job competency attainment and social capital in terms of mentoring and protege relationships. A series of hierarchical regression analyses were run to test the path model. Although a positive relationship was found between acting as a protege and job satisfaction, acting as a mentor had a negative relationship with income. The results showed a strong relationship between career competence and income, promotion, job satisfaction and career choice satisfaction. For training and development professionals, job competency is the key factor in their career success. (Contains 3 figures and 3 tables.)