From March 1915 to October 1919, he taught church history and pedagogy at the theological seminary in Sibiu. By the time he left, both Transylvania and Bukovina had united with Romania; from 1919 to 1922, he was professor of general church history at his alma mater in what was now Cernăuți. Between 1922 and 1940, when the area was occupied by the Soviet Union, he was professor within the department of medieval, modern and contemporary world history within the Literature and Philosophy Faculty at Cernăuți. For the 1923-1924 academic year, he was dean of the faculty, while from 1925 to 1926, he was rector of the university. In 1921, Cândea was involved in a student-led campaign to fire two Jewish professors, including Eugen Ehrlich, and wrote an article denouncing the "ferocious pan-Germanism of a Jew".