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.
For nearly 15 years, from 1973 to 1987, he held a position at the USSR Ministry of Railways as a medical epidemiologist. In 1982, he took on the role of chief health officer for the Moscow metro, and in 1983, he became the head of the central health and disease surveillance center within the Ministry of Railways.