The company Lucchini – Mariotta & Associati SA (SILMA) is an engineering firm specializing in three core activities:
1. **Civil Engineering**: The company offers services in the field of civil engineering, including the planning and implementation of infrastructure projects such as roads, bridges, sewage systems, and buildings.
2. **Forest Engineering**: SILMA provides services in the field of forest engineering, including the planning and management of forest areas, wood production, and forestry.
3. **Traffic Planning**: The company offers services in the field of traffic planning, including the planning and implementation of traffic infrastructure such as roads, highways, and public transportation systems.
These three core activities are the main focus of the company and are supported by various projects and references on the website.