In the worst case, if he's established the precedent of working weekends and is now expected to do so, a fresh start could still be useful. Transitioning to ano

In the worst case, if he's established the precedent of working weekends and is now expected to do so, a fresh start could still be useful. Transitioning to another company might also help provide him with the clean mental slate necessary to trash this habit of over-working himself. Also, there is the possibility that the company is somewhat at fault--his post is lacking details, and he may be under legitimate pressure to do extra work.