Admin support for DSL and SEN roles

[psydii]

So, it is typical for a PA to have access to their boss's mailbox.

 

But what if the email they are handling is particularly sensitive. With the PA to the "chief exec" that goes with the job.

 

But what of lesser roles where a general department admin is de facto the HoD's PA and the HoD holds some of elements of SEN /DSL roles...? What hurdles need to be cleared to be able to allow the admin person to fully support their HoD? Is it even achievable?