He was born to Antoni Łokuciewski in Novocherkassk in the Russian Empire. His family moved to Vilnius in 1918. He then graduated from high school Jan Śniadecki in Oszmiana and gained his high school diploma in 1935. He then began studying at the Polish Air Force University in Dęblin. After his graduation he was assigned to the 112 Fighter Squadron of the 1st Air Regiment located in Warsaw, Poland. As a part of the unit he fought in the defense of Warsaw in 1939 using a PZL P.11 plane. After the invasion of Poland by the USSR he along with the 112 Fighter Squadron escaped into Romania.