Permissions for users in an account can be changed in the Virbela dashboard by anyone with Admin privileges.
Navigate to app.virbela.com and sign in.
Under your name, which is located on the top left of the screen, click on the silhouette icon, and then click on "Members"
Search or navigate through the user list to find the user whose permissions you would like to change. Once you find them, go to the "Role" column and click on the drop-down menu and choose the role you want to give the user.
Once you change the permission, a confirmation banner will show up on the top letting you know the change went through.
Have the user log out and log back in so the changes take effect.
A word of caution: assigning permissions to your users is a lot like giving out keys to your office. Most people need only access the offices (member), while some may need access to the tools to help orchestrate operations (moderator), and a select few have full access (admin), opening the door to view personally identifiable information and make changes to user statistics in app.virbela.com.