From the article:
"...86 people have been found to be working illegally for a San Diego military contractor, more than half the company's 167-person work force."
Let's see, 86 out of 167 workers were illegal aliens. That means that the other 81 workers weren't illegal aliens. Now what was that you were saying about jobs that Americans don't want to do?
Generally, you would say that the illegals were doing the worst of the work or the gopher work. Those that were legal would be the painters and the supervisors.