Type 1: Loyal female villains who serve another villain or villainous organization. Ethics do not factor into their decision to do so. As far as they are concerned, they are devoted to the individual(s) above them, and that is all that matters. That said, this by no means implies that they are incapable of enjoying their job, as a bonus.
Type 2: Villainesses at the top who have ideals and actions align with creating a controlled order. Because of this, many are likely to have a Freudian Excuse that is motivating them to do this.