Context and purpose: Human power in any organization causes the effectiveness and efficiency of the organization. Employing efficient human resources and establishing organizational justice requires the presence of competent leaders and the use of an effective leadership style in order to increase the effectiveness of employees and ultimately improve organizational efficiency and justice. The purpose of writing this article is to investigate organizational leadership style on the effectiveness of employees by explaining the mediating role of organizational justice..
Research method: The method of conducting this research is practical in terms of its purpose and descriptive in terms of data collection, the statistical population includes all the employees of the Islamic Azad University, North Tehran Branch, which currently includes 420 staff. Also, 201 employees were selected as a statistical sample using Cochran sampling method. In this study, to collect data, the standard questionnaires of organizational leadership style and organizational justice of Murad Obrich et al. (2021) and the effectiveness of Tahereh et al. (2012) employees were used and distributed randomly and in doing so the technique Descriptive and inferential statistics have been used. Multiple regression tests, factor analysis, structural equation method and Sobel test are used to analyze the data and Smart Pls 2 software is used to perform econometric operations.
Findings&Conclusion: The results of data analysis from the structural equation model showed that there is a direct relationship between leadership style and employee effectiveness, and organizational leadership style has a positive and significant effect on employee effectiveness through the mediating variable of organizational justice. The results showed that the research hypotheses were confirmed at the significant level of the relationship between organizational leadership style and organizational justice (7.12), organizational leadership style and employee effectiveness (2.73), and organizational justice and employee effectiveness (2.68).
Suggestions: By choosing the appropriate leadership style for educational organizations and paying attention to organizational justice, including the level of fair payment of salaries, increasing rewards based on employee performance, employee participation in decisions, and prioritizing the effectiveness of employee efficiency from human resources, which are the main assets of the organization.