If it is truly expunged, it's gone. If you have any doubt, it may simply have been sealed. Some fed jobs and jobs that require clearances may be able to access even a "sealed" record. Call that court that expunged and make sure.
If it was merely sealed, as said, it depends on the job; possession may exclude you from the work if they can still access it.
The phone call Could be a job offer..you never know
EDIT:@Dudley--No. Post a Link that it Doesn't. I am working on set aside, etc, Right Now. I can post links to our law library at our superior court that say it Does--If Granted, that is.
applied for set aside, have sealing in 5 years.