It is not uncommon for people to have a misdemeanor on their record. Even if it has been expunged, it needs to be disclosed on every application up-front with an adjoining letter explaining the situation.... what happened, and why it won't happen again. Did you disclose the info on your initial application? If not, it could disqualify you..... an expungement does not exempt you from disclosure. Anyhow, why do you need to work for Kaiser? Did you go to school there? Do you have to work for them? Anyhow, there are many places to work in So. Cal.... USC, UCLA, VA hospitals.... If you apply elesewhere, you ought to disclose your misdemeanor..... Otherwise, I suggest writing a letter to the Kaiser recruiter and requesting a meeting so you can clear the situation.