Notification eMail on upload per folder

We have a customer who whants to be informed on folder base if files are uploaded.
The structure of the folders is pretty flat.
Its more or less 2 levels:
top level β€œClients”
second level β€œ00001”, β€œ00002”,β€œ00003” and so on (about 500) folders.
The folders are created centrally by admin-user and he wants to inform the employes who is responsible for a clients if a client uploaded a file.

He does not want to let the employe create and share the folder himself and if the employe leaves company or changes responsibilty the email adress for notification has to change.

Any idea hwo to solve this?
Possible feature request?

thx in advance