me, i would primarily stealth in the restroom, like many have suggested, but if you notice someone is going out for a smoke break, join them. believe it or not many vapers still smoke. i know a large number of people in the army vape and smoke... but even if they dont, thats not why im suggesting this, it gives you two advantages...
1 remember smoking out with everyone, conversations had, good way to get to know people you work with, good way to get a feel for the company
2 someone just may stop you one time and say you know the boss said we could use those inside...
in the army, i work in my company area, i am fairly positive my bosses dont care about me vaping in the office, but we have A LOT of traffic that consists of high ranking people... so i usually go outside just to be safe...
rennovating building, lead poisoning, long story short we got moved to a different area... talking with one of the guys in a different companys area comparing mods, etc, i am on my way out the door, and am stopped, you know our bosses dont care if you vape inside, in fact they are fine with it... and we have less traffic over there... so i vape at my desk, but i hold it and stealth it, kinda