He served as "Prime Minister in duties of the President" (in other words, Estonian head of state in exile) from 23 December 1970 to 1 March 1990.
In 1916, he studied in the building department of the Riga Polytechnical School, which was later evacuated to Moscow.
In 1918, he studied in the agricultural department of the Baltic Technical University, opened in Riga by the German occupation administration.
In 1916, Kint was mobilised to the Russian Army, finished military school at Tsaritsyn (known today as Volgograd in Russia) in 1917.
During the First World War, he served in an infantry regiment of the Russian Army.
In the beginning of 1918, Kint joined a newly formed Estonian regiment at Viljandi.
In 1940, he put up a candidacy on the Riigivolikogu elections as one of the counter-candidates of the "Estonian Working People's Union."