Ensure that your wife has the NBI, Certificates, Diplomas, Job references and contacts for her prospected job and bring here to Doha... the following link provides info on how to get at work permit for your wife...

http://www.qatarliving.com/answers/visas-and-permits/work-permit-for-wif...

http://www.qatarembassy.net/Work%20Permits.asp

Good Luck.