| Client name | City | Country |
|---|---|---|
| John Crane GmbH | Fulda | Germany |
| John Crane Sealing Systems India Pvt. Ltd. | Pune | India |
| John Zink GmbH | Frankfurt | Germany |
| John Zink KSS | Dudelange | Luxembourg |
| Johnson Matthey Chemicals GmbH | Emmerich | Germany |
| JSC Severodonetsky ORGHIM | Severodonetsk | Ukraine |
| Juette Engineering | Kempen | Germany |
| Jungbunzlauer Austria AG | Wulzeshofen | Austria |
| Junkalor GmbH | Dessau | Germany |
| JVS Engineers Pte Limited | Singapore | Singapore |
| JVV Holding BVBA | Lint | Belgium |
| KAB TAKUMA GmbH | Berlin | Germany |
| Kali-Chemie AG | Nienburg | Germany |
| KBN Engineering GmbH | Marl | Germany |
| KBR ENGINEERING & CONSTRUCTION INDIA PVT LTD. | Gurgaon | India |
| KCG College of Technology | Chennai | India |
| Kent | Houston | United States |
| Kentrol Automatic Control Engineering (Jiangsu) Co. | Xuzhou City | China |
| KERN Technology GmbH & Co. KG | Eisenberg | Germany |
| Kernkraftwerk Brunsbüttel GmbH & Co. oHG | Brunsbüttel | Germany |
| Kerr McGee Pigments N.V. | Antwerpen | Belgium |
| Key Valve Technologies Limited | Kyunggi-Do | Republic of Korea |
| KEY-TECH Engineering Company, Mumbai, Ind | Mumbai | India |
| Keynes Planungsgesellschaft mbH | Neuss | Germany |
| Keystone GmbH | Mönchengladbach | Germany |