AtkinsRéalis operates as an integrated professional services and project management company worldwide. It operates through six segments: Engineering Services, Nuclear, O&M, Linxon, LSTK Projects, and Capital. The Engineering Services segment provides consultancy, engineering, design, and project management services for the transportation, building and places, defense, water, industrial, minerals and metal, and power and renewables sectors. The Nuclear segment offers services for clients across the nuclear life cycle consultancy, field, technology, spare parts, reactor support, and decommissioning and waste management services, as well as engineering services; and new-build and full refurbishment services for reactors. The O&M segment provides operations, maintenance, and asset management solutions for bridges, transit systems, highways, and buildings and industrial plants, as well as postal services and ships. The Linxon segment provides engineering, procurement, management, and construction services for execution of alternative current power substations, including expansions and electrification through repetitive EPC offerings for various markets, including utilities, renewables, conventional generation, transportation, and data centers. The LSTK Projects segment undertakes construction contracts for the mass transit projects. The Capital segment engages in the developing of projects, arranging financing, investing in equity, undertaking complex financial modeling, and managing its infrastructure investments, such as bridges and highways, mass transit systems, power facilities, energy infrastructure, water treatment plants, and social infrastructure. The company was formerly known as SNC-Lavalin Group Inc. and changed its name to AtkinsRéalis in September 2023. AtkinsRéalis was founded in 1911 and is headquartered in Montreal, Canada.