Frm many years Maciej Grzegrzolka together with his team, had a plasure to work for such clients as:
- 4P Research Mix
- Aerzener
- Ashland
- Arcelor Mittal Steel
- Avon
- AxFlow
- Biesterfled
- Deloitte & Touche
- Doehler
- Dr. Irena Eris
- Ebro Puleva
- Ensto Group
- Ergis
- Eurozet
- Foster Wheeler
- Fortum
- Fuchs Gewurze
- Grespania
- Grupa Żywiec
- Haier
- HP Pelzer
- Indesit
- ING Bank Śląski
- ING Real Esteta
- ING Lease
- Kompania Piwowarska
- Scamark /Leclerc
- Lubasa
- Mars
- Maspex Wadowice
- NOMI
- Orange
- Polimeri Europe
- PZU
- Raisio
- Reporter
- Reynaiers
- Ruukki
- Scandiafelt
- Teekane
- Teknoprod