Mr. Farash's answer is correct but in your case, you are coming t Qatar for employment purpose. If such visa need to be stamped from the concerned embassies. In your wife's case, in case, she did not land until now in Qatar, and you obtained her visa in nyour hand, you can endorse a copy to the concerned airlines. THen they will send the message to Riyadh airport stating that the original visa available at Doha Airport. In such situation, no problem for embarkation and disembarkation. Wish u all the BEST.