AoA
There may not be need of another post
http://www.cssforum.com.pk/beginners...-nab-jobs.html...
Has anybody asked him to renounce his other nationality?
It is often said that a civil servant should not be having a dual nationality, however, there is no such rule in black and white. There are a lot of civil servants having dual nationalities, as such this may not be an issue.
Let him ask from the NAB management, if NAB is having any such restriction or not. Do not go with hearsay, seek evidence/rule to this effect.
Regards