Every day just after 5pm, sitting in my college's Engineering atrium, I would start to see a veritable army (dozens and dozens) of youngish, well-dressed people

Every day just after 5pm, sitting in my college's Engineering atrium, I would start to see a veritable army (dozens and dozens) of youngish, well-dressed people walk out to the parking lot and leave. They weren't faculty, because I knew all of the faculty, and they weren't students. They had little embossed metal nametags. I suddenly realized that the classrooms and labs I knew were only a tiny part of the actual building, and we were outnumbered.