He studied organ at the Conservatory of Music in Kraków and composition at the Institut Jaques-Dalcroze near Dresden.
He continued his studies at the Saint Petersburg Conservatory, but his education was interrupted by military service.
Wiechowicz authored a number of works on vocal pedagogy, and wrote for publications including Przegląd Muzyczny and Muzyka Polska.
[1] He received a number of composition prizes, and was awarded the Order of Merit of the Republic of Poland in 1952.
[3] Wiechowicz married Valentina Szaposznikow, and during World War II, he worked as a lawyer.