Born in Nikolsburg in Moravia, Austria-Hungary (now Mikulov in the Czech Republic) in 1885,[2] Jung attended the Kunstgewerbeschule in Vienna from 1901 to 1908,[3] where he produced woodcuts, linocuts, lithographs, postcards and book images in a distinctive humorous, often bizarre, graphic style under tutors Carl Otto Czeschka, Bertold Löffler, Felician Myrbach and Alfred Roller.
During his studies he published a book of colored woodcuts of animals, Freunde geschnitten und gedruckt von Moriz Jung (Lipsia and Vienna, 1906), and in 1907 received a prestigious commission from the Wiener Werkstätte to create the poster for the newly opened Viennese "Cabaret Fledermaus".
In 1907, whilst still a student at the Kunstgewerbeschule, Jung began contributing designs for the Wiener Werkstätte's 63 postcards which now form the bulk of his surviving works.
Jung did not agree with the widespread war euphoria of the time, and wrote "All doubts about vocation and the like have disappeared, blown away in the thunder of the guns, and when I fall in the field, I know that I have not only lived for myself but also for my people.
As soon as he had recovered, he had to go back to the front and was killed in the winter-long Carpathian Battle on March 11, 1915, on the Manilowa Heights near the village of Łubne, south of Baligród.