Originally Posted by
idliman
GC is for a future job. The employer agrees to give you a job and you agree to work in that job. So IMO, you don't need to refile PERM, just be prepared to work in that location for 6 months after you get your GC. Once I-485 is pending for 180 days, you are eligible for AC21 job portability. But you can use it to "port" to current location. If you wish you can submit an I-485 Supp J at that time. It will be a miracle if your GC is approved within 180 days of filing the application. Lots of people here have filed for GC with Employer A, while working for Employer B. Your case less questionable relatively speaking.
Convince the employer and attorney that you are going to work in the original job location after GC. As Q mentioned this is only about the relationship between you, your manager and HR. If HR says make it happen, the law firm will make it happen.
As far as predictions go, I have lost the touch. My wild prediction is that nothing will happen on the immigration legislative front till a) One party gets 60 Senate seats, b) Filibuster gets abolished OR c) When US Lawmakers realize that they are losing to China on Tech and need Indian brain-power to compete with the world. They don't need extra brainpower for IT (We already have lots of brilliant minds caught in the backlog). But for Core Sciences the politicians have not realized it yet and immigration is not their priority. So plan your lives assuming that nothing will happen legislatively.