Carlos Fernández Casado Project Office
Company founded in 1964 by Professor D. Carlos Fernández Casado
together with two young disciples, Javier Manterola Armisén and his son Leonardo Fernández Troyano.
Since then the company has developed an uninterrupted activity.
In its origins, the company had a strong relationship with the company Huarte y Cíaone of the country’s leading construction companies at the time, which would later become part of the international construction giant OHL. The firm gradually opened up to collaborations with other clients, including public administrations, construction companies and private clients.
CFCSL’s international activity also began in these early stages, collaborating with Huarte y Cia in Latin American countries, where Pr. Pr. Fernández Casado had a notable prestige and projection thanks to his teaching activity and his technical publications. This international presence has been increasing and nowadays it is one of the main sources of activity of the company.
Since its inception, the company has had the opportunity to participate in some of the most important civil engineering and architectural projects.It has designed singular works, from the world’s first bridge built by successive cantilevers with prefabricated segments, to a world record in concrete cable-stayed bridges, and is currently participating in the design team of the largest cable-stayed bridge in the USA.
Throughout its almost 50 years of activity, the company has participated in some 900 projects, mostly bridges but also covering special structures of all types (high-rise buildings, towers, roofs, dams, transport stations and sports facilities) as well as rehabilitation projects for sensitive historical constructions.
In 2025, the company becomes part of the Swiss group ARX. This strategic step allows us to maintain our essence and our independence in order to continue offering a personalized, highly qualified and technified service, open to any challenge. And, at the same time, it will greatly enhance our management and response capacity, multiplying our possibilities to provide the resources that each project requires at any given time.
It brings together the best of several engineering worlds to form an unbeatable team, with highly specialized capabilities in many of the main branches of civil engineering. Thus, together we will be able to meet new challenges by reaching new markets and expanding our global reach.
By joining ARX, we consolidate our track record and open ourselves to new growth opportunities. ARX, formerly known as Pini Group, is a Swiss company with more than 70 years of history, present in 25 countries and with an outstanding participation in some of the most innovative Infrastructure, Urbanism, Energy and Industry projects in the world. Projects in 75 countries, with more than 150 airports, 200 bridges, more than 3000 buildings, 4000 km of railways and subways, more than 5000 km of tunnels and 25 MW of hydroelectric power. Its vision of cutting-edge engineering, based on the fusion of global knowledge and local expertise, aligns perfectly with our identity and values.
What does this mean for our customers and partners?
CFC will remain the same team, local and accessible to its clients, but the integration with ARX will also allow us to:
– Access to a global talent network of more than 1,500 engineering and design experts.
– Increased management capacity, adopting innovative methodologies in project development.
– Expansion of our international presence, strengthening collaboration with companies, governments and academic institutions around the world.
– Commitment to sustainability, providing efficient and environmentally responsible solutions.
ARX | smart minds and CFC. A new adventure in the world of engineering and design.
D. Carlos Fernández Casado (Logroño 1904 Madrid 1988). Honorary President and Founder of CFC.
First director of the company from its foundation until 1984, he is an essential reference in contemporary Spanish Engineering and Architecture, not only for his mastery in the construction of bridges and buildings, but also for his great intellectual prestige and his studies on the history and aesthetics of public works. A civil engineer at the age of 19, he had an extensive professional career as an engineer for the Ministry of Public Works and as an independent consultant before founding the company that bears his name.
His training and early works in the 1920s and 1930s coincided with the development and expansion of reinforced concrete in Europe, a material that Pr. Fernández Casado studied in depth and whose constructive possibilities he explored with great dedication. With it he did most of his early works, some of which, such as the collection of Strict Height Bridges (1930-1950) or the prefabricated industrial buildings developed in the years 1940-1950, are undoubtedly some of the great achievements of this type of construction in Spain. However, he is probably best known as one of the main introducers and developers of prestressed concrete technology in Spain.
Since the 50’s of the last century he devoted himself to study and develop works with this new technique, and with which, mostly with the firm CFCSL for the founded, he made many remarkable achievements in the period 1960-1980. In addition to his professional activity, he was a professor at the School of Civil Engineering, holding the chair of Factory Bridges until 1976 and contributing to the training of several generations of engineers. His studies and technical publications on Strength of Materials, Structural Analysis and Bridge Engineering have been for a long time essential references in the Technical Schools of Spain and also reached a remarkable diffusion in Latin American countries.
The recognition of his great contribution to the development of concrete technology led him to be awarded numerous national and international prizes, including the Gold Medal of the International Prestressing Federation (F.I.P. Féderation Internationale de la Précontrainte) at the International Congress held in London in 1974, being the first Spanish engineer to hold it. Likewise, his special concern and his studies on the artistic and historical aspects of public works – where his work on Roman Engineering should be highlighted – led him to be the first civil engineer to be elected as a member of the Royal Academy of Fine Arts of San Fernando in Madrid in 1974.
This concern and interest in the aesthetic facet of public works remains within the company and constitutes, together with its high technical capacity, the hallmarks of CFCSL. After the retirement of Mr. Carlos Fernández Casado and up to the present, the management of the company has been shared by its co-founders, Dr. Engineer Leonardo Fernández Troyano (Madrid 1938) and Pr. Dr. Engineer Javier Manterola Armisén (Pamplona 1936).
Mr. Javier Manterola Armisén (Pamplona 1936 Madrid 2024). Honorary President and Co-Founder of CFC.
He began his professional activity in the firm Huarte y Cia and before joining the CFCSL project he was a researcher at the Eduardo Torroja Institute of Construction Materials for a year.
Within his work at CFCSL he has participated in many of the engineering and architectural projects developed by the company, including the construction of tall buildings, transport stations and large sports facilities, but standing out especially for his intense activity in the world of bridges. Within it, it is worth mentioning some remarkable works such as the Barrios de Luna Cable-stayed Bridge, a world record for cable-stayed bridge when it was completed (1984).
His professional activity is complemented by an extensive teaching career at the Escuela de Ingenieros de Caminos, Canales y Puertos de Madrid, where he was Professor of Factory Bridges for 30 years. His technical publications on the calculation and construction of bridges are a reference in current Spanish engineering and have contributed to the formation of several generations of engineers, including most of the current members of CFCSL.
He has also received in its first edition the National Engineering Award granted by the Ministry of Development of Spain and the Medal of Santo Domingo de la Calzada awarded by the College of Civil Engineers of Spain (2011).
His work on public works as works of art and his studies on the structures of modern architecture from the point of view of the structural engineer led him to be elected permanent member of the Academia de Bellas Artes de San Fernando in Madrid in 2008.
D. Leonardo Fernández Troyano (Madrid, 1938). Honorary President and Co-Founder of CFC.
He has developed his entire professional career in the company since its foundation in 1964, combining this activity for several years with the teaching of Bridge Engineering at the School of Civil Engineering in Madrid.
His work with the firm covers most types of bridges, including several notable projects such as the cable-stayed Sancho el Mayor bridge over the Ebro River.
He has also participated in numerous urban planning and transport station projects with multidisciplinary teams. He has also been involved in numerous rehabilitation and reinforcement of historic buildings.
He has received numerous awards, including the John A. Roebling Medal in recognition of his career in bridge engineering awarded at the ESWP International Bridge Conference, (USA 2007) and the Medal of Santo Domingo de la Calzada awarded by the College of Civil Engineers of Spain (2008).
In addition to his prolific professional practice, Dr. L. Fernandez has developed an intense research activity on the History of Public Works and Bridge Construction. This work is reflected in numerous participations in Congresses and in several monographic publications. Among them it is worth mentioning his book “Tierra sobre el Agua. Universal Historical Vision of Bridges” with translations into English and Italian.





![ARX_Image-1024×576[1]](https://cfcsl.com/wp-content/uploads/2025/03/ARX_Image-1024x5761-1.jpg)







