The DTF Ingenieure GmbH & Co. KG was founded in Krefeld in 2004, relocated in January 2006 their location to Velbert and has since been with KRIEGER architects | Engineers under one roof. The team of the DTF has firmly established itself in the design, construction and operation of technical systems in diverse areas of expertise. This includes the construction of service and retail buildings, as well as hospitals. The themes of living and life, School & Education are also operated as the areas of due diligence. An essential pillar also represents the technical building equipment for sports and leisure baths.