An organization is an open system; consequently, any changes in the external environment will have an impact on the organization. This condition makes the organization must change. However, based on the previous experiences, not every change program had succeeded, and even can be categorized as a failure. In this regard, there are many variables can become the sources of failure namely: factors that lie in the environment, organization, and people, such as individual characteristics. Mostly the researchers pay attention to variables in the organization and personal characteristics, however, only a few their studies regarding to the perceptions of the organizational environment. The research aims to test the effect of employee's perceptions of the external organizational environment about commitment to organizational change, using psychological empowerment as a mediator. Data gathered from 539 employees working in two financial state-owned organizations in Indonesia. Results showed that there are significant effects of all the two variables, namely: organizational task environment and Psychological Empowerment on commitment to change. Results also revealed that the psychological Empowerment as a mediator had an indirect effect on a commitment to change. The implications of this study are for management of change, regarding paying attention to how people perception of their environment as well as developing psychological empowerment to achieve high commitment to change from their employees.