COMSA, S.A.U. belongs to the holding COMSA Corporación, which is the first Spanish group in the infrastructure and engineering sector not quoted on the stock exchange. COMSA Corporación focuses its activities in the areas of Infrastructure and Engineering, Services and Technology and Concessions and Renewable Energies. Currently, it is ranked as the eighth Spanish company in the sector, totaling a turnover of more over 1,100 million euros and managing a staff of over 8,400 people. The main lines of business of COMSA, in relation to the theme of the project to be developed are: (i) ENGINEERING AND SYSTEMS: Engineering, execution and maintenance of electromechanical, technological and power generation and distribution facilities such as Systems and technology and Maintenance and services. (ii) INFRASTRUCTURES: Construction and maintenance of railway infrastructures, roads, airports, buildings, ports and hydraulic works, including Roads, emblematic building, airports; Maritime and port works, hydraulic, urbanizations; Tunnels and underground works and Construction and maintenance of railway lines.