More than half a century opening ways
Important mining areas: Almadén, Iberian Pyrite Belt in Huelva, Linares and Suria
Projects: Hydroelectric Plants in Miranda, Conso, Toga; Nuclear Power Plant in Cofrentes, etc.
1985 - 2008
Road tunnels: Guadarrama, Cadí, Negrón, Piqueras etc.
Railway tunnels: high-speed network AVE (e.g. Pajares, San Pedro, Ontígola etc.)
OSSA is currently involved in constructing the main railway network (AVE) and developing roads in Spain
2008 - Actualidad
Improvements in IT systems and Management Control
Launch of International Operations, having secured contracts worth over €682 million in Europe, Asia and Latin America, and working as a partner in deals in Emerging Markets