The article theoretically investigates the issues of efficiency of team building at the present stage of personnel management development, analyzes their features in modern Russian conditions. The most important and significant criteria for increasing the efficiency of the team’s work have been considered, the priority types of work needed to rally the team have been highlighted. And also, one of the most key success factors of an organization has been determined - human resource management. The issue of team formation and the stages of team development has been actualized. A general outline of the stages of team development for the overall efficiency of personnel management has been presented. Each of the stages has been disclosed in detail and has a clear relationship with the development of the team at the adaptation stage to the final stage of the disbandment of the team, where all intensive team relations are fading away, in view of achieving the goals set. The author pays special attention to the most significant and important elements of the success of the team in view of the effective development and growth to the highest quality team. Based on a comparative analysis of controversial approaches to team building, objective and subjective factors have been highlighted, influencing the efficiency of team building in the modern personnel management process. The role of the head of the organization in the development and integration of employees into a team has been noted. Conclusions have been drawn about the overall effectiveness of team building in the modern process of personnel management, where the leading factor of efficiency is the effective group interaction of the team, as well as the recognition of team members of both personal and group goals and interests.