Who employs the most workers: private industry, self-employed engineers or government?
I have no data to give you an accurate answer, but my guess would be that private industry employs the most aerospace engineers. Additionally, the large companies hire a large number of “job-shoppers”, people who are basically self-employed engineers for hire, who are hired when demand is high and fired on a moment’s notice. These people are paid high salaries and generally have significant experience, and the risk they take is not knowing whether they will be employed tomorrow. The government also hires a significant number of aerospace engineers, but I think the number is likely comparable to the self-employment category.