Charles,
I would have to assume that even though the permits bear your signature, the lawyers would have to prove incompetence on your part by not teaching the use of safety gear when elevated up in the air. As long as you can demonstrate that you have trained the staff on this very point, then the company, or supervisors, will have to bear the brunt of the law.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.