Born in the Kingdom of Prussia, he played his entire career in France and was a French military international.
[citation needed] Mieczyslaus Lewandowski was born in Waltrop in the Kingdom of Prussia, German Empire.
Having first played for Pogon-Marles and Béthune [fr], Lewandowski was discovered by Lens in 1938, where he became professional.
He won the 1946–47 Division 1 with the club before leaving in 1950, signing for JA Armentières that year.
[4] Naturalized on 23 February 1939, Lewandowski was selected for the France military national team.