have you completed your medicals and finger prints test?

If so thn you need to get the RP sticker pasted on ur passport u can get it done from the general post office near corniche.

usually for work visa these things r done by ur company.

after all this is complete u can get exit permit from your company n then go n come back.

if u have not done the above then once u exit u will need another visa to re-enter.