| Client name | City | Country |
|---|---|---|
| Sweco bv | Brussel | Belgium |
| Sweco Nederland BV | De Bilt | Netherlands |
| Sweco Nederland BV | Groningen | Netherlands |
| Swissfluid AG | Lenzburg | Switzerland |
| SYENSQO SA | Bruxelles | Belgium |
| Symrise GmbH & Co. KG | Holzminden | Germany |
| Syncrude Canada Limited | Fort McMurray | Canada |
| Synthomer Deutschland GmbH | Marl | Germany |
| Syspac Digtal Media Sevices GmbH & CoKG | Marburg | Germany |
| System Dynamics Pte Ltd | Singapore | Singapore |
| T.EN Netherlands B.V. | Zoetermeer | Netherlands |
| Taktaz Instrument Equipment Co. | ||
| Taminco Germany GmbH | Leuna | Germany |
| Task Engineering GmbH | Frick | Switzerland |
| Tata Power Company Limited | Mumbai | India |
| TATA Steel Limited | Jamshedpur | India |
| TBP Engineering GmbH | Linz | Austria |
| Tebodin & Partner LLC | Muscat, Al Athaibah | Oman |
| Tebodin Consultants & Engineers | Den Haag | Netherlands |
| Tebodin Netherlands B.V. | Hengelo | Netherlands |
| TEC artec GmbH | Oranienburg | Germany |
| TECH.CONTROL | Tehran | |
| Technical University of Budapest | Budapest | Hungary |
| TECHNICATOME | Aix En Provence Cedex | France |
| Technip - Ets de Lyon | Vaulx en Velin | France |