Aenza S.A.A., together with its subsidiaries, engages in engineering and construction, infrastructure, and real estate businesses in Peru, Chile, and Colombia. The company operates through three segments: Engineering and Construction; Infrastructure; and Real Estate. The Engineering and Construction segment provides traditional engineering services, such as structural, civil, and design engineering; and services ranging from architectural planning to advanced specialties comprising process design, simulation, and environmental services. This segment also provides services related to civil works, which include construction of hydroelectric power stations and other large infrastructure facilities; electro mechanic construction, such as concentrator plants, oil and natural gas pipelines, and transmission lines; and building construction comprising office and residential buildings, hotels, affordable housing projects, shopping centers, and industrial facilities. It serves mining, power, oil and gas, transportation, and infrastructure development companies. The Infrastructure segment offers long-term concessions or similar contractual arrangements in Peru for three toll roads, the Lima Metro, a waste water treatment plant in Lima, four producing oil fields, and a gas processing plant, as well as maintenance services for infrastructure assets. The Real Estate segment develops and sells homes, and office and commercial space. The company was formerly known as GraÃ±a y Montero S.A.A. and changed its name to Aenza S.A.A. in November 2020. Aenza S.A.A. was founded in 1933 and is based in Surquillo, Peru.