Employee's commitment is an important work attitude for an organization. Supervisors can play a role in increasing it by conducting downward influence tactics. This study examines the relationship between employee competency and downward influence tactics (consultation, ingratiation, and exchange tactics), the relationship between these tactics and employee's commitment to the supervisor and the organization, and the mediating effect of these tactics on the relationship between employee competency and employee's commitment. Data were collected from 203 non-managerial employees who work in various industries in Surabaya, Indonesia. We analyzed the collected data by using PLS-SEM. This study found that employee competency has a significant positive relationship with downward influence tactics (consultation, ingratiation, and exchange tactics). In addition, consultation and ingratiation tactics have a significant relationship with one's commitment to one's supervisor, but only consultation tactic has a significant relationship with organizational commitment. The consultation tactic has a mediation effect on the relationship between employee competency and organizational commitment, and the commitment to the supervisor.