Before 2011, Grzegorz spent many years working in the Hadfield Cawkwell Davidson (AJ 100 UK practice) focusing on complex multi-million projects for international companies from the sports, leisure and food retail sectors. In addition, he designed the Krakow based Spedpol-Schenker's shipping centre
and project-managed big nationwide expansion projects for “House" and "Deutsche Bank" in Poland, as well as Slovakia and Russia.