When you say permanent nights, what is your work pattern eg 3 nights per week, all together; 7 nights on, 7 off etc. I worked a lot of night duties before dignosis, then changed career, got diagnosed, now only work occasional, virtually random nights. I have noticed that either people can do nights, or they can't, and since you work permanent nights, I'm assuming that you're basically happy with the arrangement?
The complication at the moment is that during the honeymoon phase, your pancreas will occasionally get into action and produce some insulin - and it doesn't take into account what you have already injected. So, key is to test before something happens eg before you have to go to another part of your workplace, but also while it's quite and easy to test, rather than in the middle of an incident, although sometimes that will be essential. I'd suggest thinking through how you can carry a blood glucose meter, emergency sweets / muesli bar etc in your work clothes. You'll know about meal breaks, energy requirements etc, so thake those into account.
If you're on a basal bolus regime, it's relatively easy to cope with shift work - take basal doses at same time, boluses whenever you eat, day or night. If you're on a bimodal regime, it's more diffiucult, but not impossible to adjust.
Finally, if you find nights too difficult, at leats initially, you could ask HR / occupational health about a temporary change to day shifts.
Hope it all goes well.
