try to start with a salary you will be satisfied with for a while... - Mitarbeiter (anonym) bei Virginia Tech: Mitarbeiterbewertung

They will not back up and pay you more when your value goes up. You would most likely have to leave the department. In other words, if you were not a supervisor when you get hired, and then you become a supervisor, you will not get paid what they would pay a supervisor getting hired from the outside - at east that has been my experience.