Visa requirements for working in uae

Dear members
I am currently working in riyadh since 8 years. I have an offer to move to dubai. But i am not sure about the new company as they are setting up a new business in dubai.

My question is , is it possible that i take a month vacation from saudia and go to dubai on a permanent visa & can join the new company without resigning from my current job? for a month ? and if the things are as per the commitments i can come back to saudia.. Resign from here , finish my resignation period?
I hope you can understand what exactly i want to know.

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