| # | Company name | Role | # of projects |
|---|---|---|---|
| 41 | Harris Civil Engineers, LLC | Sanitary engineering | 6 |
| 42 | Helman Consulting Engineers Ltd. | Sanitary engineering | 5 |
| 43 | HeRo Sp. z o.o. | Sanitary engineering | 4 |
| 44 | Hidrotech Saneamento e Proteção | Sanitary engineering | 17 |
| 45 | HPI HIMMEN Ingenieurgesellschaft mbH & Co. KG | Sanitary engineering | 4 |
| 46 | IFTG Faxel+Partner | Sanitary engineering | 1 |
| 47 | Jean Marko Engineering Consultancy | Sanitary engineering | 1 |
| 48 | KEMMLIT-Bauelemente GmbH | Sanitary engineering | 4 |
| 49 | Keuco GmbH & Co. KG | Sanitary engineering | 0 |
| 50 | Kizner L.A. Engineering | Sanitary engineering | 1 |
| 51 | KNEISZ GmbH | Sanitary engineering | 1 |
| 52 | Legrand North America | Sanitary engineering | 0 |
| 53 | Lin - Cohen Engineers | Sanitary engineering | 14 |
| 54 | Materials Management Solutions | Sanitary engineering | 1 |
| 55 | Meta Building Supplies Private Limited | Sanitary engineering | 6 |
| 56 | meta Trennwandanlagen GmbH & Co. KG | Sanitary engineering | 1 |
| 57 | Mexport S.A. de C.V. | Sanitary engineering | 10 |
| 58 | Nash Engineers Ltd. | Sanitary engineering | 77 |
| 59 | Nicoll | Sanitary engineering | 0 |
| 60 | Nohl Darmstadt GmbH & Co. KG | Sanitary engineering | 3 |