Yes ladies under husband sponsorship needs work approval from Labor department to do job here.

Here is the steps to follows:
Get a letter from your prospective employer asking CID to issue Police clearance certificate for hiring purpose.

Get clearance certificate from your concerned embassy.

Get your documents (education & experience certificate) attested from the embassy and MOFA Qatar.

Get an offer letter from your employer.
Submit all the documents along with duly filled application form to Labor department.

Labor department will issue a work permit card mentioning your sponsor valid for 1 year.