Organization owners and team maintainers have administrative permissions for teams in an organization, including repository access and team visibility.
Changing team settings
Team maintainers can edit the name and description of a team, as well as determine whether a team is visible or secret.
Adding organization members to a team
People with owner or team maintainer permissions can add organization members to teams. People with owner permissions can also add non-members to a team and the organization.
Removing organization members from a team
People with owner or team maintainer permissions can remove team members from a team. This may be necessary if a person no longer needs access to a repository the team grants, or if a person is no longer focused on a team's projects.
Managing an individual's access to an organization repository
Organization owners can manage any person's access to a repository, as well as other relevant information about the person's relationship to the organization.
Managing team access to an organization repository
Organization owners and team maintainers can add repositories to a team, as well as change the team's read, write, and admin access to the repository.