Since its beginnings more than 110 years ago, the GRUPO COMSA has participated in the development of railway infrastructures in Spain, and in the last 20 years, all over the world, in countries such as Italy, Ireland, Portugal, Chile, Argentina, Australia, the Philippines, Taiwan, Malaysia or India. This broad experience has been a key in its consolidation in the railway sector and has given it a recognised leading position in railway construction. In recent years, it has been outstanding in this area thanks to its active participation in constructing the high-speed lines in Spain and Asia, as well as for developing innovative machinery.