| Client name | City | Country |
|---|---|---|
| Dong Guk University | Seoul | Republic of Korea |
| Donghua Engineering Company | Hefei city | China |
| Doosan Lentjes GmbH | Ratingen | Germany |
| DOW Benelux N.V. | Terneuzen | Netherlands |
| Dow Corning India Private Ltd. | Chennai | India |
| DOW Deutschland GmbH & Co. OHG | Wesseling | Germany |
| Dow Olefin Verbund GmbH | Schkopau | Germany |
| DOW Olefinverbund GmbH | Böhlen | Germany |
| DREHMO CHINA | Beijing | China |
| DSA Apparatebau und Schweisstechnik GmbH | Neu-Isenburg | Germany |
| DSM Nutritional Products AG | Visp | Switzerland |
| DSM Nutritional Products GmbH | Grenzach-Wyhlen | Germany |
| DSM Polymers & Hydrocarbons | Geleen | Netherlands |
| DSM Research | Geleen | Netherlands |
| dsm-firmenich | Sisseln | Switzerland |
| DSME | Geoje | Republic of Korea |
| Dynamit Nobel GmbH | Troisdorf | Germany |
| Dyneon GmbH | Burgkirchen | Germany |
| DyStar Textilfarben GmbH & Co. | Leverkusen | Germany |
| E&C, Ingenieurbüro für | Wels | Austria |
| E.I.M.G Elektro-Industrie-Montage GmbH & Co. KG | Duisburg | Germany |
| E.ON Business Services GmbH | Hannover | Germany |
| E.ON New Build & Technology GmbH | Gelsenkirchen | Germany |
| E.ON Ruhrgas AG | Essen | Germany |
| Eastern Industrial Supplies, INC | Jacksonville | United States |
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