U.S. Marshals CareersCreated in 1789, the U.S. Marshals Service was the first federal law enforcement agency in the United States. The Marshals Service occupies a uniquely central position in the federal justice system. It is the enforcement arm of the federal courts, involved in virtually every federal law enforcement initiative. The duties of the U.S. Marshals Service include protecting the federal judiciary, apprehending federal fugitives, managing and selling seized assets acquired by criminals through illegal activities, housing and transporting federal prisoners and operating the Witness Security Program.