COMSA Corporación specialises in the construction and maintenance of railway infrastructure and superstructure (for conventional rail, high-speed rail, tramways, metros and regional rail); engineering, installation and maintenance of overhead contact lines and AC and DC traction substations; engineering, design, development, installation and maintenance of railway safety and communication systems and network management systems and control centres; railway traction; manufacture and supply of ballast; construction of concrete sleepers for main track and sidings, as well as construction for civil engineering and building works; engineering projects and construction management. COMSA Corporación is also present in the field of full maintenance of railway vehicles as well as the renting of high-tech machinery.

Top products: INFRASTRUCTURE: 1. Duplication of track on the Renedo - Guarnizo section of the C-1 suburban line between Torrelavega and Renedo. 2. Construction of the high-speed train station at La Sagrera, Barcelona. TELECOMMUNICATION: 3. Renovation of the communications infrastructure in the south and central area for Adif. MAINTENANCE: 4. Rehabilitation and maintenance of tracks and systems on Line 1 of the Mexico City Metro.

Spain: With over 130 years of history, COMSA Corporación specialises in turnkey railway projects covering construction, facilities, systems, and maintenance for high-speed, trams, metropolitan, and regional railways. Currently, the group is executing the underground works of the R2 line of Barcelona Suburban Railways as it passes through the urban area of Montcada i Reixac, which also includes the construction of the new station for the municipality. Additionally, the group is also responsible for significant projects such as the remodelling and expansion of the lobby of Chamartín station in Madrid and the construction of four additional tracks for high-speed trains, as well as the execution of the AVE station in La Sagrera, Barcelona, and Sector 3 of the Mondragón-Elorrio-Bergara line, part of the Basque Y. Within the framework of the Mediterranean Corridor development, COMSA is implementing standard gauge on the Martorell – Sant Vicenç de Calders section and has completed the laying of track between Renedo - Guarnizo, as part of the Cantabria Cercanías improvement plan.

Furthermore, its engineering business -COMSA Industrial- has developed the overhead line equipment of the La Robla – Campomanes stretch of the León – Asturias high-speed line (Pajares By-Pass), which consists of a dual electrification system comprising a 25 kV catenary and a double 20 kV high-voltage line for the supply of safety facilities, independent from the catenary. The group has also completed the comprehensive renovation of the catenary between Maçanet and Caldes de Malavella and the maintenance of the overhead contact line, substations, stations, and associated systems of FGV in Alicante.

Regarding its activities on conventional lines, the company continues to construct the new railway access to Terminal 1 of Barcelona-El Prat Airport, as well as the remodelling of the Pobla Larga-Silla section of Valencia's suburban train network, the construction of the Guadalajara - Marchamalo Railway Terminal of the Port of Tarragona, or the new viaduct of the Barcelona - Mataró - Maçanet Massanes railway line over the future canal of the Port of Badalona, among other projects.

In the urban transport area, COMSA Corporación has completed the Glòries - Verdaguer section of the Barcelona tramway and continues to build the Altza-Galtzaraborda section of the San Sebastián Metro (Guipúzcoa) as well as works on the central section of L9 of the Barcelona Metro. It has also executed the renovation works on a section of L5 and L4 of the Barcelona Metro. Moreover, the group will install automatic doors on the 70 platforms of Metro de Madrid's L6, totalling 6.4 kilometres, contributing to its conversion into the network's first automatic line. Additionally, it continues to develop contracts for the conditioning and adaptation of infrastructure, electrical installations, and systems on the metros of Madrid, Barcelona, Valencia, Sevilla, and Málaga, among others.

Europe: Endorsed by its high railway specialisation and century-old experience, COMSA Corporación has invested in markets with high opportunities for the development of new infrastructures and the modernisation of existing ones. In this regard, it continues to work on the remodelling and electrification of the railway between the provinces of Vinkovci and Vukovar (Croatia).

In Portugal, COMSA and its subsidiary in the country, FERGRUPO, are tackling the expansion project of the Yellow and Green lines of the Lisbon Metro, which includes the construction of a new 1.9 km stretch between the Rato and Cais de Sodré stops. Additionally, they continue with the renovation works of the Beira Alta line, Pampilhosa - Santa Comba Dão section and construction of the Mealhada variant, and the rehabilitation of the track superstructure of the Vouga line has been awarded.

America: In Mexico, during the past fiscal year, it carried out the project to refurbish the tracks and systems of Line 1 of the Mexico City Metro, as well as the construction of the 5 North section of the Mayan Train. Likewise, in Colombia, it is executing the maintenance, conservation and improvement of the La Dorada - Chiriguaná railway corridor.

In 2023 COMSA Corporación invested more than 5.5 million euros in R&D&i activities. Among the most outstanding projects in which the group has participated is 5GMed, where COMSA is part of the consortium of companies that has carried out the deployment of 5G technology to guarantee the connectivity of the Spanish and southern French rail network. It is also worth mentioning the group's presence in the REPAIR project, a system based on laser technology to carry out different manual maintenance operations on rail elements; as well as ISAPREF, a software that uses artificial intelligence (AI) to prevent forest fires caused by the poor state of vegetation near railway tracks and power lines.

Finally, as a member of the European Smart Green Rail (eSGR) consortium, the company participates in 4 of the 6 projects funded by the first call published by Europe's Rail Joint Undertaking, an EU initiative that succeeds Shift2Rail and of which it is a founding partner. These projects are R2DATO, IAM4RAIL, Rail4EARTH and FutuRe.

As a company specialised in the development of railway infrastructures, COMSA Corporación is a member of the Board of In-Move by Railgrup and forms part of the Spanish Railway Technology Platform (PTFE), integrated into the European Rail Research Advisory Council (ERRAC). In addition, COMSA Corporación is a founding partner and member of the board of directors of The Railway Innovation Hub Spain.

COMSA obtains the Single Safety Certificate which, together with the Railway Company Licence obtained at the beginning of 2024, allows the company to provide rail freight services on the General Interest Railway Network (RFIG).

Quality: Certification to ISO 9001, covering all the activities in which it carries out its activity, including the maintenance of high-speed track and switch gear.  
 
Environmental management: First company to receive the Constructors' Sustainability Contribution Index certificate, a unique recognition that evaluates sustainability from a 360º ESG approach, covering performance, social, economic and environmental indicators.

Certification according to ISO 14001, issued for all activities in which it operates. Certification under ISO 50001 for energy management. Certification under ISO 14064 for the quantification of greenhouse gases in all its activities in Spain.
 
The company also has projects under LEED (Leadership in Energy and Environmental Design) and BREEAM (Building Research Establishment Environmental Assessment Method) certifications and has been recognised in sustainability indices such as the Carbon Disclosure Project (CDP).

R&D&i: The R&D&I Management System is currently certified according to the UNE 166002:2021 standard, which remains valid until 11 June 2025. In May, the certification is due to be renewed in accordance with the new ISO 56001 standard, in line with the regulatory transition before UNE 166002 ceases to be in force in July 2026.
 
ISO 19650-1/2 for the organisation and digitisation of information in building and civil engineering works using BIM from March 2022. It should be noted that COMSA Corporación was a pioneer in the use of BIM, with more than 10 years since its implementation.

ORP: Certification to ISO 45000 regarding the occupational health and safety management system, issued for all activities.