On the job training was pretty standard in the tech industry in the past. I worked with a guy at an HP (oldest high-tech co. in CA) spinoff that was the head embedded software architect and worked his way up from the machine shop in the '70s. He started out manning a drill press and learned to program when they started using NC (numeric control) machine tools.
Do you think Google lets anyone to work their way up from front desk admin or barista?