Koželuh was a pupil of Josef Seger and studied under the Jesuits in Brenitz. He studied in Vienna under Christoph Willibald von Gluck and Florian Gassmann.
Koželuh received his early training under Josef Seger, a Jesuit educator, at Brenitz. He then continued his education in Vienna under two prominent figures: Christoph Willibald von Gluck and Florian Gassmann.