Let me guess, the guy who made this decision was a twisted looking runty guy, peeved you could see his bald spot? Or did he spot you copping an eyefull of his missus's cleavage (best asset of being tall)?
I can't see why ATC would not be open to Robert Wadlow. Except he's dead, so would require a fairly quiet posting...
I've worked with immensely tall people and fair dinkum midgets here and don't see any distinction between these and 'normal' people in the job. If they can use the bog and reach the buttons they're in.
Sue the barstards, you wouldn't be the first to win.
You'd be an asset on the basketball team too.