As an organization administrator, you can grant other users admin privileges by going to their member page or by going to the team page. Either way, you'll need to begin on the People page (Manage > People).
Making a user an admin from the team page
From the People page, click the Teams link.
From the Teams page, click the team that the user will be added to. Then click to Add User and enter their email.
If the user already has an account on the site, they'll receive admin privileges immediately. If the user does not have an account on the site, we'll send them an invitation email. When they click the link included in the email and create their account, they'll automatically be given the privileges associated with their team.
Making a user an admin from their member page
If the user has already created a full account on the site, you can also make them an admin from their member page. To begin, go to the People page and enter their email address into the search box. Click Look Up and you'll be brought to their member record page. From here, go to the Teams tab and click the Add User To A Team button. Then, select the team you'd like to add the user to.
If you need to create a new team, this article will explain how.