The question is if he can still get the employment verification letter. Even he can, his H1b transfer would most likely trigger RFE and since he moved job before 180 days, he may have trouble. Here is a few choices for you: 1. stay put for 7 more months. 2. go to new company and start PERM and 140, when your new 140 approved, relink your old PD and it'll be current for sure. 3. submit 485 now and move to new job and pray. The risk here is if 485 denied, new 485 later may get long delay.