Administration of Justice covers the DOJ, parts of DHS, and the federal court system — about $86 billion in FY2024. The biggest agency lines: Customs and Border Protection (~$20B for border security plus ports of entry), the FBI (~$11B for counterterrorism, counterintelligence, and cybercrime), Immigration and Customs Enforcement (~$9B for interior enforcement plus HSI investigations), the federal Bureau of Prisons (~$9B operating 122 federal correctional facilities), and the federal court system (~$9B for district + appeals courts).
On the federal contractor side, tech and IT firms dominate: Leidos (DHS / CBP border surveillance and screening systems), General Dynamics IT (DOJ + DHS network modernization), Booz Allen Hamilton (cyber and analytics consulting), CACI International (intel + cyber ops), Palantir Technologies (data platforms used by ICE, CBP, FBI), and Anduril Industries (autonomous border surveillance towers). Geo Group and CoreCivic operate private detention facilities, primarily for ICE.