EyM Instalaciones, S.A. has its origins in the company Electrificaciones y Montajes Guinovart, S.A., a company founded in 1948 and which main activity area was the railway electrification.
In 1999, it joined the OHL Group, a concessions and construction group with more than 100 years of history that develops its activity mainly concentrated in 8 home markets (USA, Canada, Mexico, Peru, Chile, Colombia, Spain and Central Europe).
Since then, a process of diversification starts, specialising in electrical, mechanical and special installations in major 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 on the national and international scope.