 Ordained in 1963, Lewek specialized in homiletics and held faculty positions the Academy of Catholic Theology in Warsaw (1967-1971) and the Institut für Katechetik und Homiletik in Munich (1971-1973).In 1973, he became a researcher at Cardinal Stefan Wyszyński University.From 2002 to his death, he was director of the Institute for Media Education and Journalism there.