I am a US citizen and have been working here in Doha for over one year. I have a potential job offer coming to me from the US. If it goes through, I would then return home and be stationed there; however, the job would require me to return here to Doha every month or two for only a few days each time. Would I still be required to obtain an NOC (no-objection certificate) from my current employer in order to return for those minimal times?