If there are moral experts, this would seem to have important implications for a number of issues in philosophical ethics. So who is a moral expert? Here are some thoughts of my own. A moral expert is someone to whom one could go for sound moral advice. The moral expert is an expert about morality in the sense that a physician is an expert about health, not in the way that (say) an historian is an expert about a particular field or period in history. That is to say, moral expertise is a kind of practical expertise.
 Moral experts would obviously know a great deal about morality. Their expertise would transcend knowledge of the mundane and platitudinous — that one should do the lesser evil than the greater, etc. But they would also have the moral knowledge capable of deciding hard cases (assuming that hard cases can be decided). Furthermore, a moral expert need not be a moral theorist, nor have a worked out moral theory. Nevertheless, the moral expert must be able to provide justifications for her moral judgments, even in hard cases. We would, I suspect, think that an ‘expert’ who dispensed moral verdicts in an oracular style (‘do X, not Y’) but was utterly flummoxed as to why these are the proper moral verdicts to reach, was not really an expert. The delicate nature of moral decision — that it involves careful weighing of interests and welafre, concern for principle, etc. — suggests that an "expert" whose accounts of her own moral verdicts were slender or non-existent is hitting upon the right moral verdicts by accident and is therefore not a genuine expert. (Sounds like Plato, don’t it?)  A moral expert is motivated by her moral beliefs. Perhaps this is more controversial. But when I envision a moral expert, it seems hard to disentangle his expertise (that he knows a lot about morality) from the desire to be good. Because bona fine moral knowledge is hard to acquire, we would expect that anyone who does acquire it will be highly motivated to act upon that knowledge. Would we not be perplexed as to how anyone could be an alleged moral expert who failed to act on her own prescriptions?
So who are the moral experts?