References   The following list is an extract of companies I am working for on a regular basis : WIG Industrieinstandhaltung GmbH & Co. KG, Köln (industrial maintenance and upkeep, building management, assembly) ThyssenKrupp group System Invest Unternehmensberatung für die Bau- und Immobilienwirtschaft GmbH, Düsseldorf (consultants for the building and real estate industry) Aengevelt Immobilien KG, Düsseldorf Comco Plast GmbH, Neuss (sale of service packages) KOS Europe GmbH, Düsseldorf (special steel processing) Reducta GmbH, Düsseldorf (consulting engineers in environment issues) ACN Anzeigen Cooperation Nordrhein oHG, Düsseldorf (supraregional newspaper publishing house) Lindner Hotels AG, Düsseldorf Crane Process Flow Technologies GmbH, Düsseldorf (industrial valves, actuators, positive-displacement pumps) PWC Deutsche Revision AG, Düsseldorf (auditing) Walter Bau AG, Frankfurt (civil and structural engineering: construction of tunnels etc.) DSU Gesellschaft für Dienstleistungen und Umwelttechnik mbH & Co. KG, Duisburg (services and environment technology) Besides further companies from trade and industry, an important number of attorneys count among my regular customers. In addition, I execute certified translations of various documents for individuals.