A major Spanish multidisciplinary engineering group (founded 1956, headquartered near Bilbao) with a dedicated fire-engineering service. Its teams run performance-based fire and smoke simulation with FDS/CFD and evacuation modelling with Pathfinder and Legion, chiefly for buildings and transport infrastructure (rail, road, maritime and airports), integrated from early design. Its analyses are decision-support for the project team, not a substitute for professional judgement.