we contacted Mojtaba by email and he was fast to reply , he picked us up from isfahan and had a 3 day desert tour with him and going deep into dahste kavir desert then city tour in yazd and our transfer to shiraz via Persepolis

his info about sites specially Persepolis was considerable , he's a coffee lover and a big kitchen in the back of his giant Nissan 4wd  car 

also his driving  on the road full of crazy drivers was outstanding 

i definitely recommend him to as a very good guide driver for iran, also he arrange visa codes specially for Brits and Americans