Hi.
I earlier cited an example from CALDŽ as follows:
"He's just been appointed (as) director of the publishing division."
Why isn't there an article?
Because it's not necessary when you appoint + somebody(+as) + job title. We would need one here: They have just appointed a new director of the publishing division,
Context is always important; labelling is rarely important.
One difference between the two examples:
They have appointed = active
He has been appointed = passive