You must be an admin to remove another admin from the organization.
To remove someone as an admin from your organization:
- Click on your organization on the left-side navigation
- Select Members
- Make sure that you’re an admin by scrolling down to your name and confirming that it says you’re an admin
- Scroll to the person you want to add as an admin
- Use the drop-down next to their name to select Member. This will remove admin controls from their account for this organization.