There are a couple of ways to to add additional administrators to your MemberHub site.
1. Go to the Admin Console and click on the Settings tab. Once there click on Administrators under the Organization Settings menu on the right.
There you will see a list of all existing Organization Administrators. If you need to remove an administrator, simply click on the x beside that person's name.
If you need to add a new Organization Administrator, click on the Add Administrator button at the bottom of the list.
You will then see an Add Administrator pop-up. Enter the person's email address and Add a Personal Message if you'd like. Make sure to click Send Invitation. This will automatically add this email address to your People tab directory.
The person will receive an email which will include a link to activate them as an Organization Administrator.
2. Go to the Admin Console and click on the People tab. Once there search for the person you want to make a site admin. Select the person(s) and click on the People Actions drop down menu. Select Make Site Admin.
You can also access People Actions in someone's profile under their profile picture. There is a Make Site Admin option there as well.