Since 1925 on forestry expeditions in the Caucasus and Siberia. Helped survey forests of: 1925 Black Sea coast. 1926 North Ossetian Autonomous Oblast.
1928 Aldan Rayon, Yakut Autonomous Soviet Socialist Republic. 1929 Tayshct and Bratsk Rayons, Irkutsk Oblast. 1930 OstyakoVogul Okrug.
1935-1938 lecturer, All-Union Zootechn. Institute of Furs and Fur Farming. Main research on biocenotic relations between plants and animals.