She is a free person. A free person has no master. Having no master leaves her free to develop relationships with whom she pleases. With such relationships come loyalties, commitments, and other interests. Sooner or later some of those interests will come in conflict.
Freedom is messy.
Freedom is especially messy for engineers. The engineer also tries to serve himself in a morally appropriate way. That is, he tries to earn a decent living by serving public, clients, employer, and profession in the way engineers should. Each profession tries to define itself so that, for example, serving the public does not conflict with serving one's employer. But, since human foresight is weak, such conflicts still occur.