Serco Group plc is a service-outsourcing company providing services for industries as diverse as nuclear power, transportation, security, and immigration. Serco provides home affairs services, including custodial accommodation, prisoner escort and custody, and accommodation and transport for asylum applicants; clinical services and custodial health services; military training, engineering, and operational support; systems engineering, safety assurance, and risk management services; transport, traffic management, and lifeline freight and passenger ferry services; and environmental services, including refuse collection, recycling, street cleaning, and grounds maintenance.