The engineers and scientists of Keuck & Partner Consultants have successfully worked for the following clients so far (as of 2019):
| Principal | Project Location | Country |
|---|---|---|
| Alfaref GmbH | Halmstad | Schweden |
| Alfaref GmbH | Alloa | Scotland |
| Alfaref GmbH | Irvine | Scotland |
| Alfaref GmbH | St. Helens | Great Britain |
| Alfaref GmbH | Vamdrup | Denmark |
| Alfaref GmbH | Dabrowa | Poland |
| Ardagh Glass GmbH | Nienburg | Germany |
| BASF | Düsseldorf | Germany |
| Bergbau AG-Westfalen | Dortmund | Germany |
| Bauen + Leben GmbH & CO KG | Krefeld | Germany |
| BSG GmbH | Kaarst | Germany |
| BSN Glasspack GmbH & CO KG | Düsseldorf | Germany |
| BSN Glasspack GmbH & CO KG | Achern | Germany |
| Dähler GmbH | Fulda | Germany |
| Dornieden GmbH | Krefeld | Germany |
| Flachglas Torgau GmbH | Torgau | Germany |
| FIAG AG | Krefeld | Germany |
| GEHE Pharma Handel GmbH | Stuttgart | Germany |
| Gerresheimer Glas AG | Düsseldorf | Germany |
| GIAG Umwelt GmbH | Torgau | Germany |
| INDUTEC GmbH | Bergheim | Germany |
| Karl Flach Verwaltungs GmbH & CO KG | Köln | Germany |
| Kommunalentsorgung Borna | Borna | Germany |
| Laarakkers Abbruch+Recycling GmbH | Krefeld | Germany |
| Meditan GmbH & CO KG | Krefeld | Germany |
| Mineralmalwerk | Siegen | Germany |
| Nienburger Glas GmbH | Nienburg | Germany |
| Nienburger Glas GmbH | Wahlstedt | Germany |
| OTTO Entsorgung GmbH | Köln | Germany |
| O-I BSN Glasspack GmbH & CO KG | Novgorod | Russia |
| O-I BSN Glasspack GmbH & CO KG | Usti Nad Labem | Czechia |
| O-I Glasspack GmbH & Co.KG | Achern | Germany |
| O-I Europe S.A.R.L. | Karhula | Finland |
| OWA Amorbach GmbH | Amorbach | Germany |
| PEG Pader Entsorgungs GmbH & CO KG | Paderborn | Germany |
| Pilkington Germany AG | Gladbeck | Germany |
| Plan Yaque Inc. | Jarabacoa | Dominican Republic |
| Rexam Glass Germany | Nienburg | Germany |
| Saint Gobain Glass Germany GmbH | Aachen | Germany |
| Saint Gobain ISOVER G+H AG | Bergisch Gladbach | Germany |
| SGO Verallia | Bad Wurzach | Germany |
| SGO Verallia | Wirges | Germany |
| Staatsanwaltschaft Bonn | Bonn | Germany |
| Stadtverwaltung Neuwied | Neuwied | Germany |
| Stadtverwaltung Oberhausen | Oberhausen | Germany |
| Spessart Glas GmbH | Lohr am Main | Germany |
| TRW Ehrenreich GmbH & CO KG | Düsseldorf | Germany |
| Upcycling GmbH | Düsseldorf | Germany |
| Vetroconsult AG | St. Prex | Switzerland |
| Vetroconsult AG | Straza | Croatia |
| Vetropack Austria GmbH | Kremsmünster | Austria |
| Vetropack Austria GmbH | Pöchlarn | Austria |
| Vetropack Nemsowa s.r.o. | Nemsowa | Slovenia |