| Kundenname | Stadt | Land |
|---|---|---|
| HERA Planung & techn. Revision GmbH | Marl | Germany |
| Herberholz GmbH | Ennepetal | Germany |
| Hermann C. Starck GmbH & Co KG | Laufenburg | Germany |
| HEROSE GMBH Armaturen und Metalle | Bad Oldesloe | Germany |
| Hexion GmbH | Iserlohn-Letmathe | Germany |
| Hexion Specialty Chemicals Forest Products GmbH, | Leuna | Germany |
| Hindustan Petroleum Corporation Limited | Visakhapatnam | India |
| Hindustan Petroleum Corporation Ltd. | Mumbai | India |
| HIT GmbH | Hamburg | Germany |
| Hitachi Power Europe GmbH | Oberhausen | Germany |
| Hoam ICT | Gwangmyeong-si | Republic of Korea |
| Hochschule Bochum | Bochum | Germany |
| Hochschule Fulda | Fulda | Germany |
| Hochschule für angewandte Wissenschaften - | München | Germany |
| Hochschule Mannheim | Mannheim | Germany |
| Hochschule Merseburg (FH) | Merseburg | Germany |
| HOERBIGER Automatisierungstechnik GmbH | Schongau | Germany |
| Holborn Europa Raffinerie GmbH | Hamburg | Germany |
| Holter Regelarmaturen GmbH & Co KG | Schloß Holte-Stukenbrock | Germany |
| Honeywell Austria GmbH | Wien | Austria |
| Honeywell Gas Technolgies GmbH | Kassel | Germany |
| Honeywell Safety Management Systems GmbH | Mannheim | Germany |
| Honeywell UOP | Antwerpen 3 | Belgium |
| Honeywell UOP India Private Limited | Gurgaon Haryana | India |
| HPCL-Mittal Energy Limited | Bhatinda | India |