EyM Instalaciones, S.A. has its origins in the company Electrificaciones y Montajes Guinovart, S.A., founded in 1948 and whose main area of activity was railway electrification.
In 1999 it became part of OHLA, a concessions and construction group with more than 110 years of history and which develops its activity mainly focused on eights markets (USA, Canada, Mexico, Peru, Chile, Colombia, Spain and Central Europe).
Since then, it began a process of diversification, specializing in electrical, mechanical and special installations in large infrastructures (airports, tunnels, etc.) and in singular buildings (hospitals, office buildings, etc.); and increasing its presence in the railway electrification sector (overhead contact lines and electrical substations), both nationally and internationally.