What am I up to?

I am considering that one of my protagionists should be a third rate hack who climbs the career ladder by  “selling” information and fixing for people in power…

He thinks of himself as some kind of invincible superintelligent Magus moving the pieces on a geopolitical chessboard.

Pretty much everybody else thinks he is a pompous pain in the *ss…even when they find him useful.

Would he be a convincing character? Or is he too far fetched?