In 1819, Tominz lived for some time in Vienna. From 1821 to 1823, he lived occasionally in Ljubljana, where he exhibited his works and painted portraits of nobles, members of the bourgeoisie, religious dignitaries and participants at the Congress of Laibach. Between 1830 and 1855, he lived and worked in Trieste. He later moved back to Gorizia, and finally to his estate in Gradišče nad Prvačino (Gradiscutta, in Italian), where he died in 1866.