From within the Parent Company account, Go to Settings>Employees and select which employees you wish to have access to the new company.
- Click on their name.
- In the top of the screen will be a button called Company Management Security. This will allow you to select which companies this employee has access to manage. It will also allow you to select what level of access they will have inside that account, such as Administrator, Recruiter, etc.
Once added, the user(s) will now see the new companies in their Managed Companies dashboard pane.