SCATANA: Good try but unfortunately that's not the case:
tehran times : Nakhjavani appointed Iran CAO director
Interestingly the Tehran Times article refers to Nakhjavani's position as the head of Kish Airlines in the past tense - this is inaccurate however as he is still the CEO of Kish Airlines. The Wikipedia article back's this up and I've also has this verified by one of Kish Air's senior MD80 Captains.
I've done a fair amount of searching, trying to find other examples like Nakhjavani's but found none so far to compare with him in that he is the CEO of a main national carrier which accounts for a significant amount of Iran's air transport traffic, and yet also serves a the head of the (impartial) national aviation regulator