Elecnor, S.A. engages in the development, construction, operation of projects and services in Spain, and internationally. The company offers energy transports, conversion, and distribution; maintenance and generation of power from wind farms, solar, biomass, combined cycle power, and hydroelectric plants; undertakes catenary, substations, signaling, interlocking, communication, and remote control works; and constructs site rehabilitation, building rehabilitation, installations, outfitting and equipment, ornamental lighting, and prefabs. It also involved in the water resource planning, and water transport and distribution networks; environmental development and protection; waste and sewerage and water purification treatment and reuse activities; transmission of power generated by gas-fired plants; construction and maintenance of distribution pipelines; and operation of compression, and metering and regulator stations. In addition, the company offers energy maintenance and efficiency services, such as technical assistance, administrative support, network operations, live working, installation and equipment maintenance, and customer management; telecommunications comprising telecommunications infrastructure, systems and networks, automation and infrastructure control, smart cities, and industrial automation; and electricity, HVAC, fire protection, ventilation, energy efficiency, automation and control, management systems, safety and security, public address and sound systems, telecommunications, plumbing , and sewer systems facilities. Elecnor, S.A. was incorporated in 1958 and is based in Madrid, Spain. Elecnor, S.A. is a subsidiary of Cantiles XXI, S.L.