Different sections access to be given to different type of users are not working

Summary:

We have 3 different type of competency section based on different grades. Management competencies section, Support competencies, Testing competencies etc. People in the respective group should see only the respective sections. For ex: Management level people should see only management competencies section and they should not see Support and Testing competencies section and vise versa. We are able to achieve it using different Roles and assigning it in the Profile content section access. But is there a way to achieve this without creating multiple roles as in with one employee role? as we might end up creating multiple roles