Overtime Overload

It's been a busy week. My colleague D.N. officially announced his resignation. He already told me last week. Deep down I suspect he was serious, but on the surface I had this lingering hope that perhaps come Monday he'll laugh out loud and say it's all just a joke. My group cover many networks but there are a handful of network only D.N. and I can properly handle. Lots of time when other admins try to work on these troublesome networks, something would go wrong and us two would end up fixing the problems. D.N. had to take the rest of the week off to do something so I had been stuck doing his work while juggling my projects, etc. I put in some overtime so only today I'm almost caught up with the overload.