Group Members have the ability to change roles for themselves and others.
On the Group page select the Members tab on the left side of you screen. You will see all the group members listed with dropdown menus in the Role column.
All members except Report Users will see these roles in a dropdown bar and can change the member status of all group members. Only Group Owners are allowed to transfer ownership to another group member. You can do this by selecting the dropdown bar next to each group member's name and selecting the role that fits them best.
*Note: A group member cannot assign themself a higher role or add a new group member at a higher role