Corporate Social Responsibility (CSR) has been increasingly demanded by stakeholders, being characterized by the stakeholder's ongoing commitment to ethical behavior in the environmental and social sphere. By means of a unique, in-depth and qualitative case study, this research sought to study the role of Human Resources Management (HRM) in CSR practices at a Brazilian Public Company Focused on Energy Operations Service. To this end, data were collected in interviews with the company’s executives, in official documents and in press releases, based on the theoretical concepts of CSR and HRM. The results analysis pointed out that several CSR practices are currently incorporated both in the internal environment of the institution and externally, so that the HRM area is responsible for the development and implementation of these practices. Thus, the main contributions of the study consist in: offering a synthesis on the two themes and analyzing the role of the HRM area in the development and implementation of CSR practices in the organizational environment.