| Kundenname | Stadt | Land |
|---|---|---|
| TOTAL Raffinage France SA | Chateauneuf-Les-Martigues | France |
| TotalEnergies Global Information Technology Services | LILLE CEDEX 9 | France |
| TotalEnergies Raffinerie Mitteldeutschland GmbH | Leuna | Germany |
| Toyo Engineering Corporation | Chiba | Japan |
| TP Utilities Pte. Ltd. | SINGAPORE | Singapore |
| TPI GmbH | Braunschweig | Germany |
| TPL | Roma | Italy |
| TRACTEBEL ENGINEERING S.A. | Brüssel | Belgium |
| Tractebel Gas Engineering GmbH | Taipei | Taiwan, Province of China |
| Transalpine Ölleitung in Österreich Ges.m.b.H. | Matrei in Osttirol | Austria |
| Trei GmbH | Stuttgart | Germany |
| TRIPLAN AG Gelsenkirchen | Gelsenkirchen | Germany |
| TRIPLAN GmbH | Leverkusen | Germany |
| TRIPLAN GmbH | Karlsruhe | Germany |
| Tronox Limited | Kwinana | Australia |
| Tronox Pigments (Holland) B.V. | Rotterdam | Netherlands |
| TTP GmbH | Rosenheim | Germany |
| TURN2X | München | Germany |
| TÜV Austria GmbH | Wien | Austria |
| TÜV Nord Systems GmbH & Co. KG | Essen | Germany |
| TÜV Nord Systems GmbH & Co. KG | Bremen | Germany |
| TÜV Süd Industrieservice GmbH | Traunreut | Germany |
| Tyco Energie Valve | Oldenzaal | Netherlands |
| Tyco Valves & Controls Italia S.r.l. | Lugagnano Val D'Arda | Italy |
| Tyczka Hydrogen GmbH | Geretsried | Germany |