In a culture of development and globalization, organizations need to value their human capital. It is here that Human Resources Management and each of its areas of expertise gain importance, among them the Performance Appraisal, as it has a direct impact on the results of organizations and the performance of employees. It is from here that the subject of this research arises, to analyze the Performance Appraisal satisfaction of the Officers of Administration of the Guarda Nacional Republicana. This investigation is pertinent due to the lack of studies in public sector organizations, of which the Guarda Nacional Republicana is part, as one military security force. The overall objective of this paper is to analyze the satisfaction resulting from the Performance Appraisal process in the Guarda Nacional Republicana. Following the hypotheticaldeductive method, a questionnaire survey allowed to collect enough data to test the hypotheses of investigation, using parametric and nonparametric techniques. Thus, it was possible to conclude that the Administration Officers of the Guarda Nacional Republicana feel a slight Performance Appraisal satisfaction. This result was strongly influenced by the unsatisfactory results related to the Performance Appraisal System and the Performance Appraisal Interview, notorious in the results of the analysis of the data collected.