A public administrator is an attorney that gets appointed by the courts, (typically in probate matters), to act when there is a contested matter and there is no one to serve as fiduciary or where there is disagreement as to who should serve. Other lawyers do not "work for one," so I am not sure what you mean by this. If a judge determines that any fiduciary has breached his or her duties, the judge has a great deal of discretion as to what to do. This can include sanctions or removal.
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Since each case is unique, you may want to get a copy of the probate file and talk to a lawyer about what is going on in your case.
I am licensed to practice law in Michigan and Virginia and regularly handle cases of this sort. You should not rely on this answer. You should consult a lawyer so you can tell the lawyer the entire situation and get legal advice that is precisely tailored to your case.