text: Hi Houseman.  It is advisable that both you and your new employer notify the USCIS of your change in employment.  If everything goes smoothly and you can prove that you have a similar job under the new employer, it shouldn't be required.  However there are cases where it helps.\n\neg.\n\nThe USCIS stated in an August 4, 2003 memo that, if a sponsoring employer revokes an approved I-140 petition after the I-485 application has been pending for 180 days or longer, and there is no notification on file that the foreign national is using AC21 portability, the USCIS must then issue a Notice of Intent to Deny (NOID) the I-485. In order to prevent the USCIS from issuing a NOID, it is generally advisable for the applicant to notify the USCIS of the job change under AC21 as soon as possible. \n\nYou want to make sure you report everything to the USCIS to make sure there is no confusion over your application.