| Kundenname | Stadt | Land |
|---|---|---|
| TEC artec GmbH | Oranienburg | Germany |
| Technische Fachhochschule Wildau | Wildau | Germany |
| Technische Universität Hamburg-Harburg | Hamburg | Germany |
| Tectrion GmbH | Leverkusen | Germany |
| Tectrion GmbH | Dormagen | Germany |
| TEHA Engineering GmbH | Haltern am See | Germany |
| TGE Gas Engineering GmbH | Bonn | Germany |
| TGE Marine Gas Engineering GmbH | Bonn | Germany |
| Theisen GmbH & Co. KG | Ochtrup | Germany |
| ThyssenKrupp Industrial Solutions AG | Dortmund | Germany |
| ThyssenKrupp Industrial Solutions AG | Bad Soden / Taunus | Germany |
| ThyssenKrupp nucera AG & Co. KGaA | Dortmund | Germany |
| Thyssenkrupp Steel Europe AG | Duisburg | Germany |
| thyssenkrupp Uhde GmbH | Dortmund | Germany |
| ThyssenKrupp Uhde GmbH | Dortmund | Germany |
| ThyssenKrupp Uhde GmbH | Bochum | Germany |
| Ticona GmbH | Oberhausen | Germany |
| Ticona GmbH | Sulzbach | Germany |
| TotalEnergies Raffinerie Mitteldeutschland GmbH | Leuna | Germany |
| TPI GmbH | Braunschweig | Germany |
| Trei GmbH | Stuttgart | Germany |
| TRIPLAN AG Gelsenkirchen | Gelsenkirchen | Germany |
| TRIPLAN GmbH | Leverkusen | Germany |
| TRIPLAN GmbH | Bad Soden am Taunus | Germany |
| TRIPLAN GmbH | Karlsruhe | Germany |