Yes, people with Asperger's can work in any field, though you will mostly find them in fields that they personally enjoy. The vast majority of Aspies tend to avoid jobs with loads of interaction with people, so supermarkets, tool stores, and the like are usually out of the question. There are no jobs an Aspie can't do, there are just jobs they would rather not do. Though I do believe most Aspies work in some STEM field, or a field that can be related. I think there is a very small percentage (0-10%) who would be willing to work in any field.