Your wife can get a job even if she is under your sponsorship. You only would have to issue an NOC in her favor and then her employer can get a labor card for her.
I would suggest her to get registered with the following recruiting websites.

  • www.bayt.com
  • www.gulftalent.com
  • www.monstergulf.com

    You also can contact other recruiting agencies operational in Qatar...they might be of your help.