 Some professors also earn additional income by moonlighting in other jobs, such as consulting, publishing academic or popular press books, giving speeches, or coaching executives.Some fields (e.g., business and computer science) give professors more opportunities for outside work.A report from 2005 by the "Deutscher Hochschulverband DHV", a lobby group for German professors, the salary of professors, the annual salary of a German professor is €46,680 in group "W2" (mid-level) and €56,683 in group "W3" (the highest level), without performance-related bonuses.