Depends on where. In Canada, type 2 definitely isn't, otherwise all our fat truckers would be out of a job. Not sure about type 1s - I only have a handful of Type 1st patients and they are in other fields. Actually, one of them IS a commercial pilot, he's a very special case, though, and there are very rigorous guidelines in place for him at work - he is only really able to successfully follow them because he requires very low insulin doses.