Holger Sievers

TÜV NORD AG provides testing, inspection, and certification services. It offers seminars, courses, professional development, and in-house training courses in relevant subjects to companies and private individuals. The company was founded in 1869 and is headquartered in Hannover, Germany.

TÜV NORD Bildung develops skills. Since 1990 they have been a successful training partner of both companies and public bodies. Their work focuses particularly on providing a secure supply of skilled workers through preparatory and vocational training, and on further developing their qualifications and those of managers in line with personal and market requirements. The wide range of courses offered by TÜV NORD Bildung cover industry, technology and engineering, road traffic and related themes, logistics, transfer services and also natural sciences, languages, the world of commerce and IT.

TÜV HSA Holding GmbH & Co. KG is a private company based in Hannover, Germany. The CEOs of the German company are Holger W. Sievers, Guido Rettig. The company provides professional, scientific and technical services.

INFO Gesellschaft für Informationssysteme Aktiengesellschaft operates as a reseller of software and provides software services for businesses. The segments of the firm include Systems, Security, Applications and Networks. The systems segment provides computer centre outsourcing services for operating systems, databases, software applications, desktop services and local support. Security segment provides consulting services such as determination of the existing level of security and disclosure of potential weak points. The Applications segment provides consulting services for SAP, integrated e-Business, data integration and data warehousing. The Networks segment provides both advisory consulting for LAN and WAN solutions along with their operation. The company was founded in 1981 and is headquartered in Hamburg, Germany.

DMT GmbH & Co. KG provides mining equipment and consulting services. The company was founded in 1990 and is headquartered in Essen, Germany.