| Firma | Kanton | PLZ | Ort | Webseite | |
|---|---|---|---|---|---|
| Pronto AG | St. Gallen | 9000 | St. Gallen | www.pronto-ag.ch | |
| Basler & Hofmann AG | St. Gallen | 9000 | St. Gallen | www.intep.com | |
| Hälg & Co. AG | St. Gallen | 9001 | St. Gallen | ||
| pom+Consulting AG | St. Gallen | 9001 | St. Gallen | www.pom.ch | |
| Vadea AG | St. Gallen | 9008 | St. Gallen | www.vadea.ch | |
| diemenergie gmbh | St. Gallen | 9010 | St. Gallen | www.diemenergie.ch | |
| art light GmbH | St. Gallen | 9014 | St. Gallen | www.artlight.ch | |
| EgoKiefer AG | St. Gallen | 9014 | St. Gallen | www.egokiefer.ch | |
| Pfister + Pfister | St. Gallen | 9014 | St. Gallen | ||
| IEP Ingenieure AG | St. Gallen | 9015 | St. Gallen | www.iep-ingenieure.ch | |
| Meier Tobler Lüftungshygiene AG | St. Gallen | 9015 | St. Gallen | www.lueftungshygiene.ch | |
| HEFTI. HESS. MARTIGNONI. St. Gallen AG | St. Gallen | 9015 | St. Gallen | www.hhm.ch | |
| EQUANS Services AG St. Gallen | St. Gallen | 9016 | St. Gallen | www.equans.ch | |
| EIFFAGE SUISSE AG | St. Gallen | 9016 | St. Gallen | ||
| Sanitas Troesch AG | St. Gallen | 9016 | St. Gallen | ||
| Tiro Ofenbau AG | St. Gallen | 9016 | St. Gallen | www.tiro.ch | |
| Klima Komfort GmbH | St. Gallen | 9016 | St. Gallen | www.klimakomfort.ch | |
| Bauatelier Schwartz AG | St. Gallen | 9016 | St. Gallen | www.bau-atelier.com | |
| Bauatelier Schwartz | St. Gallen | 9036 | Grub | www.bau-atelier.com | |
| Schadegg O2-Care GmbH | Appenzell Ausserrhoden | 9042 | Speicher |
