| Client name | City | Country |
|---|---|---|
| IFFCO Limited | Iffcotownship S.O | India |
| IGL Ingenieur Gesellschaft Ludwigsfelde mbH | Ludwigsfelde | Germany |
| iHandl Engineering bvba | Assenede | Belgium |
| IHI Corporation | Köln | Germany |
| IKG-Fichtner GmbH & Co KG | Ludwigshafen | Germany |
| ILF Beratende Ingenieure GmbH | München | Germany |
| ILF Beratende Ingenieure GmbH | München | Germany |
| ILF Consulting Engineers Austria GmbH | Leobersdorf | Austria |
| ILF Consulting Engineers Austria GmbH | Wien | Austria |
| ILVA S.P.A. | Taranto | Italy |
| Impac Offshore Engineering GmbH | Hamburg | Germany |
| INA-ÖKI-TEM | Zagreb | Croatia |
| Inaceinox SA | Vale de Cambra | Portugal |
| Indian Farmers Fertilizers Co-Opertaive Ltd. | Phulpur | India |
| Indian Farmers Fertilizers Co-Opertaive Ltd. | Gandhinagar | India |
| Indian Institute of Chemical Technology | Hyderabad | India |
| Indian Oil Corporation Limited | Haldia | India |
| Indian Oil Corporation Limited | Noida | India |
| Indian Oil Corporation Limited | Panipat | India |
| Indian Oil Corporation Limited | Barauni | India |
| Indian Oil Corporation Limited | Mathura | India |
| Indian Oil Corporation Limited | Bongaigaon | India |
| Indian Oil Corporation Limited | Guwahati | India |
| Indian Oil Corporation Limited | New Delhi | India |
| Indian Oil Corporation Limited | Faridabad | India |