I'm going to have to disagree IMR2009 - I sponsored my husband from May 2009 until he began working at the start of October, and he was designated as "muhrem" on his residence visa - which I believe translates as a male acting as the companion of a female relative on pilgrimage. When he accepted his job I checked with our PRO and one of our Free Zone sponsors - both of them told me we could not just arrange a work permit but that he would need to be fully sponsored by his employer. Ashish I don't know if this is a universal rule, but would recommend that you check with DNRD or your employer before taking work to make sure that you are legally covered to work.
I sponsored my husband for a residence visa only. When he gained employment, I cancelled the visa that I had sponsored and his company provided residence and employment sponsorship.
In my opinion - it was definitely worth sponsoring him as an interim measure, it saves any hassles with visit visas and helped us both feel more secure / settled - BUT he could not simply get a labour card from his employer as a woman sponsored by her husband can.