Re: Back to work meeting with supervisor
You should plan to pump every 3 hours at least while you're away, and most people use a whole 30 mins to pump per time - 15-20 mins of pumping, plus set-up & clean-up. Having access to a fridge would be excellent, or at least a good cooler, so that you don't have to wash your parts each time. If you do that, you won't need a sink on a regular basis.
Since you have a longish commute, I'd suggest trying to pump on your way in, so if you work 8-4,
7:30 commute & pump
10:30 pump at work
1:30 pump at work
4:00 commute & pump
You'll want to tweak this if you need to pump using your lunch break, or if you will pick up your LO at 4:30 and think you won't have enough milk right then if you've just pumped, etc. (That was never a problem for me - I actually tried to pump right before I would need to nurse, because then I maximized my pump output and my LO was patient enough/my supply was good enough that he was satisfied, although he would cluster feed - which is good for supply!)
Sick room might be a good place, but if I were you I'd want to have the key myself, both for my access and my peace of mind that no one will walk in on me!
The other thing I'll say is - while you're away, pumping has to be a priority in your schedule. It is necessary for your baby and your own health. So make sure it's clear in your mind that it's not something that can be pushed back or skipped or whatever - pumping times are not optional!
Ideally, you will have a relaxing private place. I found it useful to watch a slideshow of photos of my LO, so having a computer or ipad or smartphone will help too.
And good luck -
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.