He is constantly walking around the school with no objective - when not being bossed around by the board. During the times when he is not, he implements ridiculous rules like banning Harry Potter from the library because it contains witchcraft - but I'm not the one who believes in the casting of devils from a man to a herd of animals.
He is the figurehead of a theocratic institution, and he is a puppet.
I honestly don't belive he does much for the school. I've only ever seen him a handful of times over the 9 years I've been at ncc. He doesn't bother to learn any of the students names. Brings in rules with out taking any consideration if students or parents. Very opinionated.
I've been at ncc for around 5 years and I've only seen Mr. Cambell a handful of times!! But I suppose he does all the "behind the scences" work. He does a good job.
Not really a "people person" but has made NCC what it is.