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.
In 1919, he became the leader of the Geography Department at Moscow University, and between 1923 and 1927, he oversaw the Scientific Research Institute of Geography. Unfortunately, his poor health made it impossible for him to continue working after 1927.