This study focuses on exploring the Competency Model for human resource professionals in military organizations. Employing a purposive sampling technique and the 360 degree feedback method to distribute questionnaires to all respondents in military organizations, this study collects data with regard to the competency items and individual performance. An exploratory factor analysis (EFA) is employed to extract four dimensions of competency for the supervisors and staffs in the departments of human resource management, respectively. For supervisors, dimensions of competency are “team facilitation”, “knowledge of strategic human resource management”, “steady traits of leadership”, and “impact management”. As to staffs, four dimensions are “knowledge and skills of human resource management”, “self-development”, “work motivation and personal justice”, and “sensitivity and interpersonal skill”. In addition, this study adopts the technique of hierarchical multiple regression to test the relationships between these dimensions of competency and job performance. The results indicate that these competency dimensions both for supervisors and staffs provides a good explanation in predicting an individual’s job performance. Based on the findings of this study, implications and recommendations are provided for managerial practices and future research.