In fact the profession for sure is effecting the subject and Nationality ... that’s the true ... but he can apply for a one month Visit visa Via Qatar airways ... Application from Airport immigration department, his passport copy, his Qatar residence permit copy, your passport copy, marriage certificate copy should be stamped by Qatar embassy in your country if its not in Arabic language
Approval will be after 2 days of submission maximum
Cost is 70 QR = 20 $