To view your team members: Navigate to the "Members" tab in your settings section to see everyone in your Team Space. You can change members to admins, change admins to members, and remove members from the team.
To change the admin of your team on Dive, click on your profile icon to access "Settings". Click "Members" to display a list of all the members of your team. The drop-down against each member's names gives you 2 options: "Make Admin" and "Remove from Team". Select any one of the teammates as the new admin and you're all set.
To remove an admin, click the drop-down against the current admin and click "Remove Admin".