Leadership is a popular field in management that is often researched and written about in the science literature. There are many definitions of leadership, but each has a common thing, and that is influencing others in order to achieve a common goal. Team leadership, as one of the approaches to leadership, means leading organizational groups that coordinate their interests in order to achieve group goals. Second chapter in theoretical part of the paper includes the connection between leadership and organizational performance and an overview of basic theories of leadership, in addition to the conceptual definition of leadership. The third chapter explains the elements of the Hill model of team leadership, that is the main subject of observation of this thesis, and how its determinants affect the overall effectiveness of the model. This model is a useful tool that a leader can use to identify problems in a team and offers potential solutions for those. In the empirical part of the paper, the respondents' views on issues related to the team and leadership performance were explored. The research was conducted through an anonymous questionnaire on a sample of 31 respondents in a call center in Zagreb. The results showed that most respondents are satisfied with the existing performance of the team and management. Based on them, it can be concluded that the management of employee performance within the organization is successful.