If you are an Admin of your Talenth account, you can always edit your team members' roles from the Team page.
Head to the "Team" section where you will see all the teammates that have joined your team on Talenth.
Click on the team member's name you want to change the role for. Then select the role from the drop-down menu, as shown in the screenshot below.
After selecting the role, click on the "Save" button on the top right corner to save the changes.