He then served as Agent of the Finnish Film Chamber in 1942–1948 and as managing director in 1948–1949.
Since 1949, he was a lawyer for Alko and a public relations officer.
Hiitonen was involved in politics first in the National Progressive Party and then in the Socialist Unity Party.
At the end of the 1940s, he served as the editor of the Socialist Unity Party, the weekly magazine Vapaan Pohjola.
In 1953, Hiitonen published the book entitled "Vääryyttä oikeuden valekaavussa", in which he discussed, inter alia, political trials in the 1920s and 1930s and the imprisonment of so-called gang of six at the beginning of the Continuation War.