In the state of Maryland, you can no longer expunge alcohol-related driving offenses. So, if you’re convicted, it will remain on your record.
On a brighter note, there is also what’s known as a “probation before judgement” (PBJ) in Maryland. This is common and usually successful for first-time offenders, as well as subsequent offenders (whose charges have been far enough apart), if they follow the proper steps. With a PBJ, the judge will find you guilty of the offense. It’s then your job to follow all the conditions, treatment, community service, etc. given by the judge. While it doesn’t necessarily give you a free pass, the reason people like PBJ because they don’t get points on their license.
In Maryland, we have a point system. If you’re convicted of driving under the influence, a 21902A (DUI) carries 12 points, meaning your license will be revoked. Although the MVA cannot revoke your license based solely on points, the 21902B (DUI) carries 8 points, meaning your license will be suspended until the points come off (not impossible, but a major hindrance). With probation before judgement, however, you won’t receive these points.