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OG reference: https://support.atlassian.com/opsgenie/docs/invite-users-and-manage-their-roles/
Create roles, change roles for members, or delete members.
Search members
Users are listed via Users Page or User API. Opsgenie provides the ability to use search queries to filter the users while listing them
If you are a user, you don't have a right to configure schedule, integration, automation, policies etc. You will still have a right to see schedules or alerts, visibility won't be effected by this.
Updating Other Users
Owners, admins, and users with edit configuration rights can update other users' login e-mails, profile details, and roles.
To update profile details, click the desired user to update. The Profile page of the clicked user opens. Update the login e-mail and profile details the same way as updating your own.
Click on the role of the user to update a user's role. Select the desired role from the drop-down list that displays all roles including the custom roles (if any).
Only account owners and admins can update their own and other users' roles. In other words, even if a user is granted with Edit Configuration right via a custom role, s/he is not able to manage roles.
Account owners manage the roles of all users. However, account admins cannot manage the roles of owners.
Only account owners can update a user's role as Owner.