Carillion plc operates as an integrated support services company in the United Kingdom, the Middle East and North Africa, Canada, and the rest of the world. The company operates through four segments: Support Services, Public Private Partnership (PPP) Projects, Middle East Construction Services, and Construction Services (Excluding the Middle East). It provides maintenance, facilities management, and energy services to buildings and large property estates, and public and private sectors; infrastructure services for roads, railways, and utility networks, primarily telecommunications and power transmission and distribution sectors; and remote site accommodation and consultancy services. The company also offers project finance, support, and construction services for public private partnership projects to deliver public sector buildings and infrastructure; and construction, civil engineering and development, and consultancy services to a range of buildings and infrastructure focusing on contracts for long-term public and private sector customers. It serves aviation, corporate, financial services, oil and gas, central and local government, defense, healthcare, transport, education, commercial and retail, and residential and leisure sectors. Carillion plc was formerly known as Cameron 1999 PLC and changed its name to Carillion plc in June 1999. The company was incorporated in 1999 and is based in Wolverhampton, the United Kingdom.