Construction of the E75 Rail Baltica railway line Warsaw - Bialystok Łódź Chojnywater pumping station Expansion of the siding railway station in TP No. 74 in Ostrów Wielkopolski Warsaw Metro Construction of the overhead line 110KV Koluszki - Brzeziny Construction of approach lights Rzeszów Jasionka Construction of the MPS Depot for the F-16 Modernization of the railway line Warsaw - Lodz stage II HDPE PKN Orlen SA in Płock Construction of the Track System Kozienice Power Plant with the SRK system and the power industry Construction of the Oil Terminal in Gdansk Construction of the PTA installation in Włocławek Modernization of the railway line Lodz - Warsaw Construction of a reservoir park at OLPP Koluszki Construction of MPS-1 and MPS-2 Poznan Krzesiny HDD drilling under the Vistula River Construction of the hallŁódź Agglomeration Railway Expansion of the existing plant repair rolling stock - implementation of stage II of the investment in Libiszów Construction of the South Hospital in Warsaw CERTIFICATES