| Kundenname | Stadt | Land |
|---|---|---|
| OMV Deutschland GmbH | Burghausen | Germany |
| Optitec Gesellschaft für ökonomische | Wiesbaden | Germany |
| OQ Services GmbH | Oberhausen | Germany |
| OSCHATZ GmbH | Essen | Germany |
| Otto-von-Guericke-Universität Magdeburg | Magdeburg | Germany |
| Outotec GmbH & Co KG | Oberursel | Germany |
| Oxxynova GmbH | Steyerberg | Germany |
| P & M Industrie-Anlagenplanung GmbH | Frechen | Germany |
| Paul-Ehrlich-Schule | Frankfurt/Main | Germany |
| PCE Realtec GmbH | Berlin | Germany |
| PCK Raffinerie GmbH | Schwedt/Oder | Germany |
| PCR Engineering GmbH | Wallenhorst | Germany |
| PELZER EDV+PERIPHERIE GmbH | Mönchengladbach | Germany |
| Petroplus Raffinerie Ingolstadt GmbH | Kösching | Germany |
| Pfeiffer Chemie-Armaturenbau GmbH | Kempen | Germany |
| Pharmatec GmbH, a Syntegon company | Dresden | Germany |
| PHOENIX Armaturenwerke GmbH | Volkmarsen | Germany |
| Pipeline Ingenieur-Team GmbH | Leipzig-Markkleeberg | Germany |
| Pipeline Technik Insumma GmbH | Puchheim | Germany |
| PKB Ingenieurgesellschaft mbH | Gelsenkirchen | Germany |
| plantIng GmbH | Köln | Germany |
| plantIng GmbH | Gelsenkirchen | Germany |
| Planungsbüro Klaus Bonten | Seeshaupt/Starnberger See | Germany |
| Pörner Ingenieurgesellschaft mbH | Grimma | Germany |
| PRE-VENT GmbH | Burghausen | Germany |
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