These are people who have access to the Divvy web app. They have the responsibility of adding people to their organization, ordering cards, assigning people as owners/members, and creating budgets. Admin have the ability to view all transactions and export data as needed.
There may be one or more Owners assigned to each budget by the Admin. Owners have the ability to send or approve funds within the designated budget; this is done through the mobile app. Here is a video look at a budget owner's role. Video.
Members are assigned to specific budgets. They only have access to funds within the budgets that have been approved for them by the Owner. All transactions made by Members may be seen by Owners and Admin.