| Don't wish to dishearten you, but I think it's unlikely that you would win a legal battle. I don't know what the law is in the US, but in the UK, if you have diabetes you are automatically barred from the armed forces, the fire service and law enforcement, on the ground that you could have a hypo at a potential dangerous time. Despite your apparantly good control and qualifications, these kinds of employers have no obligation to assess each individual's case. If they see 'diabetes', then they're fully within their rights to refuse employment.
The only exceptions to in this case are when employees develop diabetes whilst being currently employed. There was a case of a firefighter who had this happen to him so he was dismissed from his job, but after a lengthy legal battle he was reinstated.
Currently Diabetes UK over here is lobbying for individual assessment rather than blanket bans. Examples of the stupidity of the law include office jobs in the armed forces - for instance, I wouldn't be able to get a 9-5 desk job in RAF logistics because of the armed forces ban. Similarly, there was another case 2 years ago of postman who had T2. He used to drive a post van on his rounds, but then his doctors decided he should move to injections rather than tablets. Because Royal Mail have a policy that people who have to inject insulin cannot drive RM vehicles, they made him ride a bike instead, on the grounds that he might have a hypo behind the wheel. This struck me as incredibly dumb, since even people on tablets have hypos, and riding a bike would be much more likely to cause a hypo than driving a van!
Anyway, don't want to dishearten you, by all means give it a shot, but I think you might end up being disappointed and there's not really a lot you can do about it. Sorry. Been through all this before myself so I know what a s**** deal it can be. | 
