Implenia 

Implenia AG provides construction and real estate services in Switzerland, Germany, Austria, Norway, Sweden, France, and internationally. It operates through Buildings; Civil Engineering; and Service Solutions segments. The company engages in tunnel construction; civil engineering; structural engineering; foundation engineering; structural design; building preservation; and depots. It also engages in construction maintenance; works yards; building construction logistics; and bar post-tensioning systems services, as well as solutions for excavations, retaining structures, deep foundations, and noise barriers. In addition, it provides building construction services, such as new construction, modernization, master builder, and timber construction; real estate development, management, investment, consulting, and planning services; real estate products; building technology planning; construction logistics; building physics, acoustics, sustainability, and energy; facade and geotechnical engineering; and pre-tensioning technology services. Further, the company provides system solutions; fibre building materials; and expanded polystyrene tunnel elements. The company is headquartered in Opfikon, Switzerland.