Costain Group PLC is an engineering solutions provider. The Company offers consulting, project delivery, and operations and maintenance services. The Company operates through two segments: Natural Resources and Infrastructure plus Alcaidesa in Spain. The Infrastructure segment operates in the highways, rail and nuclear markets. The Company's Natural Resources segment includes the Company's activities in water, power and oil and gas markets. The Company offers a range of integrated services, including advisory and concept development, specialist design, program management, project delivery, technology integration and asset optimization and support. The Company offers life-cycle services to energy, water and transportation sectors across the United Kingdom. The Company provides a range of highway services, from asset inspection and assessment; scheme development; managing the statutory process; detailed design and construction; commissioning and handover, and maintenance and aftercare.