| Client name | City | Country |
|---|---|---|
| HARBIN BINDA VALVE MANUFACTURE Co., LTD. | Harbin | China |
| Harbin Electric Corporation co. | Harbin | China |
| HARDWARE INFOGERANCE SAS | Nanterre | France |
| Hasenjäger & Domeyer Metallverarbeitung-GmbH & Co. KG | Celle | Germany |
| Hatch Associates LTD | Brisbane | Australia |
| Hatch Associates LTD. | Mississauga | Canada |
| Hatch Energy Ltd. | Calgary | Canada |
| Hefei General Machinery Research Institute | HF | China |
| Hefei Institute of Plasma Physics | China | |
| Henjes Metall- und Anlagenbau GmbH | Garbsen | Germany |
| Henkel AG & Co. KGaA | Düsseldorf | Germany |
| 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 |