 After World War II, he stayed in Italy, where he directed a Polish-language feature film about the Battle of Monte Cassino, and then three Italian films.Later in his career, Waszyński worked as a producer for the major American studios in Italy and (primarily) Spain, credited as "Michael Waszynski".His credits include "The Quiet American" (1958) (associate producer), "El Cid" (1961), and "The Fall of the Roman Empire (film)" (1964) (executive producer and associate producer).