Generally, I haven't seen past admins careers effect head apps, anyways. To address your concerns, if he does in fact abuse his powers, Aurora has failsafes in place for that. In the form of IR reports and the CCIA. If he is a real baddie, he'll be punished by the ironfist of our NT internal affairs.
Anyways, I personally haven't seen much of you. But the story is alright and reasoning is sound. Neutral.
I wasn't just referencing admin careers. I've seen him play heads before, too. If it gives me anymore validity, this isn't a character assassination, I consider this person my friend. I simply do not think he is an ideal choice for a head of staff.
Edit: And while I'm at it, I don't think I am either, but I'm not applying for it, so this isn't about me. (Dodging future rebuttals)