Implenia is a Swiss real estate and construction services company with activities in development and civil engineering in Switzerland and Germany. Implenia is also active in tunneling and related infrastructure construction in Austria, France, Sweden, Norway and Italy. The Group was formed at the beginning of 2006 from the merger of Basel-based Batigroup Holding AG with Geneva-based Zschokke Holding SA. The headquarters are located in Glattpark in the canton of Zurich. Implenia is one of the 500 largest companies in Switzerland. Wikipedia