Hi Karen,
I've had much the same experience in my work, I work shifts and I'm on call every third week, which means I may have to drive hundreds of miles to deal with breakdowns.
I get very little to no support from my local diabetic nurse's (which is not really a bad thing)
Because we diabetics don't wear a sign and 99% of people don't understand anything about diabetes it's ignorance because they have not been affected by diabetes.
most working environments are discriminatory mine is without a doubt.
In a very short time your friend will have things under control and be fine, maybe your friend needs to ask the doctor about changing insulin I'm type 1 and on novorapid and lantus with no problems.
I don't advertise my diabetes and I don't hide it.
Sorry its not a cheery reply but it's how it is.
Alan