| Firma | Kanton | PLZ | Ort | Webseite | |
|---|---|---|---|---|---|
| TechCom electro ag | St. Gallen | 9200 | Gossau SG | www.techcom.ch | |
| Technica Architecture | Wallis | 1997 | Haute-Nendaz | www.mamaisonbois.ch | |
| Technitherm - Yannick Rossier Sàrl | Wallis | 1950 | Sion | www.technitherm.ch | |
| Technoswiss SA | Tessin | 6716 | Acquarossa | ||
| Tecnoprogetti SA | Tessin | 6528 | Camorino | www.tecnoprogetti.ch | |
| Tecnoservice Engineering SA | Freiburg | 1700 | Fribourg | www.tecnoservice.ch | |
| Tecnoservice Engineering SA | Wallis | 1920 | Martigny | https:www.tecnoservice.ch | |
| Tecnoservice Engineering SA | Neuenburg | 2000 | Neuchâtel | www.tecnoservice.ch | |
| TECSA | Wallis | 1964 | Conthey | www.tecsa.ch | |
| TECSA | Wallis | 1920 | Martigny | ||
| Tectom Koller | Thurgau | 8266 | Steckborn | www.tectom.ch | |
| TEKNOCAD Engineering SA | Freiburg | 1720 | Corminboeuf | ||
| Th. Huonder + Partner AG | Zürich | 8304 | Wallisellen | www.thhp.ch | |
| Thalmann Steger Architekten | Aargau | 5430 | Wettingen | www.thalmannsteger.ch | |
| Theo Wernli AG | Aargau | 5112 | Thalheim | ||
| Thermibat SA | Waadt | 1350 | Orbe | httpswww.voenergies.ch/thermibat | |
| Think Exergy SA | Tessin | 6850 | Mendrisio | www.thinkexergy.ch | |
| Thomi AG | Bern | 3272 | Walperswil | www.thomiag.ch | |
| Thöny + Thöny GmbH | Graubünden | 7220 | Schiers | www.tt-ofen.ch | |
| Tigges Architekt | 08012 | Barcelona | www.tiggesarchitekt.ch |
