Google Groups - Add a manager to your Google Group

If you’re a manager of a Google Group, you can add other members as managers to share administration of your Group.

Step

Click the name of the group you'd like to add a manager to.

Under the People heading on the left, select Members.

Find the person you want to promote to moderator, and select the Role drop down, then click Manager. Make sure to save your changes.

Please Note: Setting an Owner is not available, but the Manager role should be all you need to administer your Google Group.