RK85

Hi, I have a very simple question about changing employers while your GC is in process. I have got mixed answers everytime I have asked somebody. Could somebody please throw some light on this in very simple words. My situation right now is: I am on H1B visa second term. My GC has been filed in EB2 category and My priority date is Dec 2012. I want to know if I can change employers at this point of time. If I do, what are the consequenses and what are the powers of my current employers in terms of withdrawing my application? Kindly advice. Thanks Rk