After his return home, he became a school teacher at Bundesgymnasium in Vienna, but in 1907 he moved to Munich, where he participated in the Thesaurus Linguae Latinae project.
[1] From May to July 1916, Max Lambertz visited as part of an expedition of the Balkan Commission of the Austrian Academy of Sciences for the first time North and Central Albania to scientifically deal with the Albanian language and folklore.
After 1934 after Engelbert Dollfuss took over, he retired as a longtime member of the Austrian Social Democratic Party, enrolled at the age of fifty-three years back at the university, and studied this time Protestant theology, but his dissertation was rejected for racial reasons, since his mother came from a Jewish family.
[1] In June 1945, after had joined the Communist Party, he became director of the Leipzig "Fremdsprachenschule" (College of Foreign Languages), in 1946, Professor of Comparative Linguistics, and until 1949 the dean of the new Faculty of Education at the Karl Marx University.
Even after the breakdown of close political relations between Albania and the Warsaw Pact, he refused to completely abandon its links with the country.
[1] As a professor of comparative linguistics at the University of Leipzig, Lambertz lived with his wife Josepha in a villa in nearby Markkleeberg.