What's the vibe like in the Marketing dept at Kaiser Permanente? How many hours are you working?

Vibe depends entirely on your manager's working style. The company espouses a collaborative mentorship environment at all levels, even purchasing coaching for new executives. However, not all managers prefer this style, and life can be difficult if you're not used to that. However, even in that case it doesn't mean long hours. Staying late is very rare and in general discouraged for most teams. That isn't to say you might not just be working from home at night on your laptop, though...