Career Managing Up → Workaholic: Nature

Tends to be suffering pressure from above

Industry norms - Are other people with his position in similar companies having to work the same way?

Organization norms or merger/acquisitions - Some organization cultures drive manager to work harder with increasing goals each year.

Is he simply passionate about what he does?

Marital status or social circle - does he have family or friends to spend time together out of his office hours?

Does he treat work as his life?

Is he having an aim to climb up to next promotion?