Criminal Law Questions? Ask a Criminal Lawyer.
you can apply for a pardon from the Governor in the state where you were convicted and then file for an expungement of the conviction. you cannot file for expungement without the pardon. however, getting a pardon does not guarantee the court will allow the expungement. they are different processes at different levels.
but if you get the pardon and not the expungement, you can always note on the application that the pardon was granted.
you need to apply for a Presidential pardon if federal. but you have to wait until you are finished your entire sentence. here is that information and application forms
with a felony, you will not be licensed as an RN. you need to get the matter removed from your record. you can only do that with a pardon and that clears a federal record. you can consult with a local attorney who can assist you in getting it done.