| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | S. Gilboa Engineers & Consultants | Sanitary engineering | 142 |
| 2 | Sanit Engineers Ltd. | Sanitary engineering | 7 |
| 3 | Scan-Clean Oy Ab | Sanitary engineering | 1 |
| 4 | Scheu & Wirth TGA und Service GmbH | Sanitary engineering | 0 |
| 5 | SOLAR4ENERGY Haustechnik GmbH | Sanitary engineering | 1 |
| 6 | Southern Chute, Inc. | Sanitary engineering | 6 |