| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 |
|
elevator engineering | 50 |
| 2 | Adams Elevator Equipment Co. | elevator engineering | 0 |
| 3 | AH Conseil | elevator engineering | 1 |
| 4 | A.P. System srl | elevator engineering | 0 |
| 5 | Arabian Elevators Engineering | elevator engineering | 0 |
| 6 | Armor Elevator | elevator engineering | 0 |
| 7 | Büro für Fördertechnik Janischewski | elevator engineering | 1 |
| 8 | Cea srl | elevator engineering | 0 |
| 9 | Charles E. Knox | elevator engineering | 1 |
| 10 | CNIM Canada | elevator engineering | 3 |
| 11 | Control Techniques spa | elevator engineering | 0 |
| 12 | Custom Industrial Products Inc. | elevator engineering | 0 |
| 13 | Daldoss Elevatronic S.p.A. | elevator engineering | 0 |
| 14 | Dmg S.p.A. | elevator engineering | 0 |
| 15 | Elmi Elettromeccanica Milano srl | elevator engineering | 0 |
| 16 | Eltec snc | elevator engineering | 0 |
| 17 | Emergenzamatic srl | elevator engineering | 0 |
| 18 | Evin Ascenseurs | elevator engineering | 1 |
| 19 | FB-Aufzüge GmbH & Co. KG | elevator engineering | 2 |
| 20 | Ferrofab L.L.C | elevator engineering | 0 |