Core Contributors are the people closely associated with your Collective, who will show up on your Collective page as part of the team.
Collective Admins are Core Contributors with extra permissions, like editing the Collective settings and approving expenses. Admins get notifications of activity on your Collective.
Go to your Collective page and click the gear next to your Collective logo.
2. Head to the Core Contributors tab. Here you can add, remove, or change people and roles.
3. Once you are done, click on Save at the bottom of the page.