Purpose: This study aims to investigate the mediating effects of communication power on the relationship between mentoring and career success. It further aims to test the moderating effects of proactive personality and self-efficacy in the model. Methodology: The study employs a quantitative research design, using survey method with questionnaire as the instrument for data collection.The population of interest is the employees at the supervisory or managerial position in various organizations in Malaysia. In order to get 95% level of confidence, a sample size of 400 supervisor/managers was used for the study. Most of the measures were adapted from established scales.Findings: The findings reveal the mediating effect of communication power on the relationship. This means that mentoring influences the communication power which in turn influences career success. Mentoring produces communication power with which it enables the employees to climb the ladder of career more effectively.Research Implication:This study makes significant contribution to the existing knowledge because not much is known about the effect of communication power on career success except for the work of Castells (2007). Practical implicationWith the present influence of communication technology at the workplace, the findings of this study are useful to Human Resource (HR) practitioners for organisation career management and mentoring programme.Originality:This study does not only examine the effect of the two variables, information power and career success; it goes a step further by taking in mentoring into the model.