Costain Group PLCCostain Group PLC is a UK-based engineering, construction and consultancy company working on critical infrastructure across road, rail, integrated transport, water, energy, and defence and nuclear. Its work covers the full project lifecycle, including planning, digital consulting, construction, delivery, and long-term operation. The company partners with public utilities, government bodies, and institutional and corporate clients to support connectivity, sustainability, safety, and resilient infrastructure. Its multidisciplinary teams may be relevant to professionals exploring careers in engineering, construction, infrastructure consulting, digital delivery, logistics, and related technical fields.