He became chairman of the Geography Department of the Moscow University in 1919 and director of the Scientific Research Institute of Geography during 1923-1927. Since 1927 he could no longer work due to grave health problems.
He became the chief of the Geography Department at Moscow University in 1919 and headed the Scientific Research Institute of Geography from 1923 to 1927. Unfortunately, he was no longer able to work due to his severe health issues starting in 1927.