Bit of a tip for people:- The prisoners you rescue that have 'Specialist' traits - Get them on Direct Contracts.
I realised the other day that a few items that I had in development had disappeared because Miller had dismissed the relevant specialist. They have pretty low stats, so once you're filling your units with staff that are ranked A++ and above, the specialists will get the boot and you'll have to re-rescue them again. If your waiting room is full, then they'll get auto dismissed as soon as you finish the mission, so you have to mess around getting rid of staff mid-mission so that you get a chance to contract them post-mission.