| Client name | City | Country |
|---|---|---|
| Innogy SE Corporate Procurement | Dortmund | Germany |
| Innospec Leuna GmbH | Leuna | Germany |
| innovatherm GmbH+Co.KG | Butzbach | Germany |
| INOMATEK GMBH | Burgkirchen | Germany |
| INOVYN Deutschland GmbH | Rheinberg | Germany |
| Inplana Industrieplanung GmbH | Neustadt /Donau | Germany |
| Inplana Industrieplanung GmbH | Neustadt /Donau | Germany |
| Institut f. Energie-, System-, Material- & Umwelttechnik e.V | Bochum | Germany |
| Intergraph (Deutschland) GmbH | Ismaning | Germany |
| INTRA-AUTOMATION GmbH | Grevenbroich | Germany |
| Invensys Flow Control | Markkleeberg | Germany |
| Invensys Systems GmbH | Ratingen | Germany |
| IPRO Industrieprojekt GmbH | Braunschweig | Germany |
| Isar Aerospace Technologies SE | Ottobrunn | Germany |
| itap GmbH | Bad Dürrenberg | Germany |
| ITT Richter Chemie Technik GmbH | Kempen | Germany |
| IVM GmbH | Leverkusen | Germany |
| JASTA-ARMATUREN GmbH & Co.KG | Essen | Germany |
| JC Eckardt GmbH | Dorsten | Germany |
| JC Eckardt GmbH | Merseburg | Germany |
| JC Eckardt GmbH | Stuttgart | Germany |
| Jensch-Kölsch & Partner | Köln | Germany |
| John Brown Deutsche Engineering | Bochum | Germany |
| JOHN BROWN VOEST GmbH | Leipzig | Germany |
| John Crane GmbH | Fulda | Germany |
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