hbt2002, I asked the same question to my corp attorney. She said it should not effect your GC at all, but they might raise the question about it while processing your citizenship if they see you left the company soon after the I485 approval. However, because it is a company restructure, not your intention to leave the job, they most likely will process the file without further problem. Again, she said it is a gray area, which means it depends on the specific officer a lot, so if you can, stay as long as possible with the job if you could.