| Client name | City | Country |
|---|---|---|
| Siemens AG | Bonn-Hardtberg | Germany |
| Siemens AG | Essen | Germany |
| Siemens AG Automation and Drives | Karlsruhe | Germany |
| Siemens AG Power Generation | Erlangen | Germany |
| Siemens Energy Global GmbH & Co. KG | München | Germany |
| Siemens Gas and Power GmbH & Co. KG | Duisburg | Germany |
| Siemens Industry Software GmbH & Co.KG | Essen | Germany |
| Siemens PG | Mülheim/ Ruhr | Germany |
| SIEMENS Power Generation | Nürnberg | Germany |
| Siemens-Nixdorf Informationss. AG | Berlin | Germany |
| Siltronic AG | Burghausen | Germany |
| SKL Engineering & Contracting GmbH | Hannover | Germany |
| SKL Engineering GmbH | Berlin | Germany |
| SKL Engineering GmbH | Magdeburg | Germany |
| SKW Stickstoffwerke Piesteritz GmbH | Lutherstadt Wittenberg | Germany |
| Smardt OPK Chillers GmbH | Neckartailfingen | Germany |
| SMB Gesellschaft für | Nidda | Germany |
| SMS Siemag AG | Hilchenbach-Dahlbruch | Germany |
| Softwarebüro Kersting | Dormagen | Germany |
| Solvay Chemical GmbH | Bernburg | Germany |
| Solvay Chemicals GmbH | Rheinberg | Germany |
| Solvay Chlorovinyls GmbH | Rheinberg | Germany |
| Solvay GmbH | Bad Wimpfen a. N. | Germany |
| Solvay Infra Bad Hönningen GmbH | Bad Hönningen | Germany |
| Stadler + Schaaf Mess- und Regeltechnik GmbH | Hamburg | Germany |
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