| Kundenname | Stadt | Land | 
|---|---|---|
| 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 | 
| hte GmbH | Heidelberg | Germany | 
| HTWS Zittau-Görlitz | Zittau | Germany | 
| Hualu Engineering company | Xi'an | China | 
| Hüttenwerke Krupp Mannesmann GmbH | Duisburg | Germany | 
| HWFB Systemtechnik GmbH | Oststeinbek | Germany | 
| Hyper Valves Pvt. Ltd. | Ahmedabad | India | 
| HYXO OY | Kerava | Finland | 
| I.E.C. Dagro B.V. | Sittard | Netherlands | 
| I.N.T. S.r.l. - Instrumentation New Technologies | Castelverde | Italy | 
| IBB Informationssysteme Beratungs | Neu-Isenburg | Germany | 
| Iberoplan S.A. | Madrid | Spain | 
| IBF | Bruckmühl | Germany | 
| ICIG Business Services GmbH & Co. KG | Wuppertal | Germany | 
| IEMA Automationstechnik GmbH | Weißkirchen | Austria |