After serving full 10 years of his sentence, Rumer was exiled to Yeniseysk. There he worked at a teachers' training college as a professor of physics and mathematics. Rumer moved to Novosibirsk in 1950, where he made both ends meet owing to casual earnings for two years. He could not get a job at universities and research institutions because of his convict status. When his exile term ended, he was accepted for a senior staff scientist at the Siberian Division of the Academy of Sciences of the USSR. In the end of 1954 he was informed by the Military Board of the Supreme Court of the Soviet Union that his case was reconsidered and the sentence was waived due to the newly discovered evidence.