It's the same skills. You are only choosing the method of remuneration. Signing on as an employee brings the secure paycheck, social camaraderie, and mind-freeing benefits such as healthcare coverage. It also involves a certain grinding routine. The private contractor boasts the entrepreneurial thrill, freedom, and often more varied work environs. Neither is a lifetime commitment. The decision may depend on which is being hired in your field currently. One may act as access to the other. Consider the many points.