Existing employee details can be edited only by admin or team leader. You need to click on 'Employees' on the left menu bar. Then search for the employee whose details need to be edited.
Click on the edit option on the right end, It will show that particular employees details for editing. After editing the details click on Update to save.
If your having an issue with editing the job details, please write an email to firstname.lastname@example.org and one of the agents from the support team will get in touch with you.