Asia Allied Infrastructure Holdings Ltd. is an investment company, which engages in civil engineering, electrical and mechanical engineering, foundation and building construction work, property development and assets leasing, professional services, and other activities. The company employs 7,898 full-time employees The firm operates its business through five segments. The Construction Services segment primarily provides engineering and consulting services in civil engineering, electrical and mechanical engineering, foundations as well as building construction. The Property Development and Asset Leasing segment develops and sells properties and leases assets. The Professional Services segment provides security, tunnel management, property management and other facilities management services. The Medical Technology and Healthcare segment manufactures and sells positron emission tomography (PET) radiopharmaceuticals for medical purposes. The Non-franchised Bus Services segment provides non-franchised bus services.