Yes, the current Org Admin can assign another user in the organization as an Org Admin. Here's how!
- Once you log in using your Org URL, you can click on the 'Users' icon on the left sidebar to get a list of users who are part of the organization.
- Click on the user who you want to make as the Org Admin.
- You can see the current role of the user and an edit symbol next to it. Click on it and change the user type to Org Admin.