One possible course of action is that Jeff doesn’t go on his vacation, and the outcome would be that he does his job like he is supposed to even if it was postponed, and as a result, the supervision of the equipment would run under him and no one else would have to be involved and everything would run smoothly for the company as well.
Another possible course of action is that Jeff finds a way for someone else to take over for him even though it was his job. This could result in committing a potential fraud or the loss of a customer. In this situation, the best option for him to take would be to talk to an executive or a higher up official because his other job is also work related and he cannot be at two places at the same time. If there is no help there, the most ethical choice would be to stay on his current assignment and get the equipment set up under his supervision.
Team McGonagall 