The concept of improving the efficiency of IT projects management is proposed, based on an integrated system approach to IT projects management and implementing a rational choice of parameters of the IT projects management system. The described approach provides integrated information processing and support for management decision-making at all stages of the IT project implementation. The integrated system approach to improving the efficiency of IT projects management involves the development of new algorithms for forming structure and composition of project teams and distribution of project team participants to project tasks using evolutionary modeling. The advantage of the proposed approach is the ability to quickly respond to changes in the parameters of internal processes of an IT project and an external environment. The proposed approach was tested when creating the corporate information system of “SMIT-Yartsevo” LLC. The application of the proposed approach at “SMIT-Yartsevo” LLC ensured the reduction in the labor intensity and timing of the implementation of the main stages of the project to create the corporate information system by increasing the efficiency of managing the formation of project teams and the distribution of tasks among project team participants. Copyright © 2020 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0)