Organizational structure is one of the main components of project management at enterprises. Knowledge in the field of project management organization should ensure the coordination and interdependence of the activities of subjects and objects of the management process. The article proposes to describe the organizational structure and the system of interactions in it on the project-oriented enterprise through the lens of the functions of electronic project management. The key roles of electronic project management are determined by the tasks that need to be solved in project management with taking into account that project management will be implemented in the information environment of modern computers. The key roles of e-project management include: responsible for electronic project management, administrator, mentor, executives, and sub-executives. Interactions between these roles form areas of responsibility of project team members, which represent pyramid interactions. It is precisely such organizational structure (pyramid) that will be at the heart of electronic project management. Based on the concepts, models and methods for organizing the interaction in the electronic project management, the role-based functional environment of the team members are defined, and the interactions that determine this environment are described. An example of the project plan in the electronic project management, as well as the interaction of project team members with each other and the electronic project management in phases, is considered.