Officially he serves as executive director of party affairs and delegate selection for the Democratic party. Ever since the Rev. Jesse Jackson in 1972 used the new rules to disqualify some members of the Illinois delegation because of their unbearable whiteness of being, delegate selection has been one huge quota-fest. But this diversity would have been all but impossible without the very kind of rigid quotas the Democratic party purports to oppose. If you think it is unpleasant to watch sausage or legislation made, consider this scheme. The DNC requires that each state's delegates be equally divided by gender.
States do have some leeway with minorities, however.
The goals reflect each group's proportion of the state Democratic electorate. In other words, these quotas are set locally, not handed down from afar. But it's not just white males who get shafted. Anybody can end up on the wrong side of this quota scheme. Even veritable civil-rights heroes are expendable if they tip the numbers the wrong way.