You can have an administrator who can see all of your teams. However, you would need to set him up as staff on each team (with administrator permission if needed).
I would recommend using the same login email address so your administrator can merge all accounts. Merging accounts would allow him to access all teams using one login details. To make merging possible, please make sure to add the administrator on all teams using the same name and email address. Once setup on all teams, please ask your administrator to do a password reset by clicking the “Forgotten your password?” link on the login window. The password reset will complete the merging process. If the teams have been merged successfully, your administrator will see all team names under the “Teams” (or “Rotas”) tab.