Unfortunately many people believe that sealing or expungement of records will erase their criminal records. In most cases and in most states, expungement means that their convictions will invisible to the public. The will always be visible to law enforcement, the court system and government agencies. Since most licensing is done through state agencies, expungement will not help them.
Many ex-offenders and felons looking for jobs seek legal counsel before the can start an effect job search just to see how their records will impact their ability to get jobs. I suggest contacting your local legal aid office to see just how viable an option expungement is for you. Next I would contact the agencies that issue the licenses you want to see if you are eligible.
I hope this helps.