This article analyses the influence of the leader on the team climate in different fields of activity. The article aims to determine the degree of influence of the leader's personality on forming the socio-psychological climate in teams from various fields of activity. The study was conducted with specialists from the IT sphere, pedagogical sphere, medicine, and law enforcement. Valid and reliable test methods were used to obtain reliable data. The prevalence of average indicators of leadership influence in the studied samples has been empirically proven. The tendencies of distribution of the components of the leader's personality depending on the sphere of professional activity were determined. Тhe study results suggest that leadership skills and organisational skills are the most important factors influencing team climate in teams of medical professionals and law enforcement, while communication skills and emotional intelligence are more important in teams of teachers and IT specialists. The research hypothesis has been confirmed. Prospects for further scientific research include studying the impact of different leadership styles on the organisational climate of the team, as well as expanding the research sample by involving representatives of a broader range of specialities.