It is good the victim seems to be in a situation where he can get thru this.
We don't know that. He had to be airlifted out. That's more than a scratch.
Yes, the employee should be charged with a crime. Yes, he should be open to a civil suit. I don't care if he's "one of ours" or not; his negligence caused grievous harm to another person.
Had I been the victim, I'd be pursuing both options, same as I would if the employee hit me with his car or injured me with an errant power tool.