Serco Group plc is a British multinational defence, health, space, justice, migration, customer services, and transport company. It is headquartered in Hook, Hart, England. The company operates in Continental Europe, the Middle East, the Asia Pacific region, including Australia and Hong Kong, and North America. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.

A private prison, or for-profit prison, is a place where people are imprisoned by a third party that is contracted by a government agency. Private prison companies typically enter into contractual agreements with governments that commit prisoners and then pay a per diem or monthly rate, either for each prisoner in the facility, or for each place available, whether occupied or not. Such contracts may be for the operation only of a facility, or for design, construction and operation.