Every business organization strives to maintain and achieve the sustainable competitive advantage to compete with the competitors. Human resource management practices are the most significant method of achieving competitive advantage for the organizations. This study examines the accomplishment of Sustainable competitive advantage by emphasizing on the strategic practices of Human Resource Management as well as highlights the mediating role of two independent variables: employee involvement and Human capital development. The personal mediation of employee’s involvement will critically evaluate the accomplishment of Sustainable competitive advantage to maintain a relationship with the strategic human resource management practices.