He's a man about town who's great at networking and well connected. He's the kind of guy who makes things happen.
MAKH-ah) a "maker" -- a big shot, the big boss, the one who makes things happen, a mover and shaker, a successful business person, Big Man on Campus. "He started out in the mail room and now he's a big macher. Runs the whole North American division!" "He gets elected to the condo board and now he thinks he's a big macher."