Abstract. This article examines the psychological factors that allow for the assessment of managerial maturity in modern organizational leaders. It analyzes the characteristics of leader competencies that enable them to provide productive management in a "CEO-organization" based on the PMI talent triangle. Special attention is given to one of the three classification areas, namely leadership. Concepts such as "personal maturity," "social maturity," and "managerial maturity" are analyzed. A review of contemporary foreign research on the competencies of effective leaders is presented. Competencies that allow leaders to overcome multiple barriers and then increase their effectiveness are discussed. Studies are analyzed that demonstrate the role of communicative responsiveness, persistence, and authenticity of the leader in employee relationships. Decision-making, information interpretation, and behavior characteristics are associated with individual characteristics of the leader. The further research path of managerial maturity of leaders in small and medium-sized businesses is outlined.