From 1973 to 1987 he worked in the Ministry of Railways of the USSR as a doctor-epidemiologist. In 1982 he became the chief sanitary doctor of the Moscow metro, in 1983 — the head of the central sanitary and epidemiological station of the Ministry of Railways.
From 1973 to 1987 he worked at the USSR Ministry of Railways as a medical epidemiologist. In 1982 he rose to become the chief health officer for the Moscow metro, and in 1983 — the head of the central health department within the Ministry of Railways.