The core activity of CERA SA is the provision of engineering services in the field of construction, particularly in the areas of: Water engineering (Cours d'eau): hydraulic and hydrological studies, mapping of hazard zones, renaturation, decanalization, stabilization of riverbanks and biological and forestry engineering structures; Environment (Environnement): studies and implementation of waste management systems, well construction, park design, environmental impact assessments, noise protection measures, soil remediation; Road construction (Routes): planning and execution of roads, roundabouts, traffic calming, pedestrian and cycle paths, geomatics; Wastewater management (Assainissement): studies and diagnosis of wastewater systems, simulations, dimensioning and construction of sewers, stormwater retention and distribution systems, studies and construction of separate wastewater systems, control of the separation of rainwater and wastewater, and adaptation of connections. The company also offers services in the areas of project management, construction supervision and management.