Creating a team
You can create independent or nested teams to manage repository permissions and mentions for groups of people.
Only organization owners and maintainers of a parent team can create a new child team under a parent. Every organization member can create teams at the highest level of your organization's hierarchy.
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In the top right corner of GitHub Enterprise, click your profile photo, then click Your profile.

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On the left side of your profile page, under "Organizations", click the icon for your organization.

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Under your organization name, click Teams.

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On the right side of the Teams tab, click New team.

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Under "Create new team", type the name for your new team.

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Optionally, in the "Description" field, type a description of the team.

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Optionally, if you're creating a child team, use the drop-down menu to choose a parent team for your new team.

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Decide whether the team will be visible or secret.

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Click Create team.
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Optionally, give the team access to organization repositories.