your question is little bit tricky , let me reply you this way :

1. if ur husband is working under some company and even you want to work in some other company then procedure is ...you get the job then you can transfer your sponsor ship which is under ur husband to the company in which you will be working ...NOC might be required from your husband company !

2. At present ,for changing job from one company to other compulsory requires NOC from sponsor !

3. If your husband resigns and want to come back qatar in other company within less time i mean to avoid 6 month ban after visa cancellation then he can request his company to issue NOC which will permit him to come back qatar any time to join new job under new sponsor.

3. If still all this is confusing then last option is to wait for some time , qatar might declare new law soon according to which NOC system will be completely removed .