This study applied social exchange theory as a conceptual framework to examine the effectiveness of various types of mentors and mentor support on protégés' satisfaction with their mentors, jobs, and perceived career success. Participants were 142 ethnically diverse protégés in informal mentoring relationships. It was found that role modeling, reciprocity, and vocational support predicted protégés' satisfaction with their mentors. Vocational support was a significant predictor of protégés' job satisfaction and perceived career success. Protégés were more satisfied with, had higher job satisfaction, and reported that traditional mentors provided significantly more vocational and role modeling support than peer or step-ahead mentors.