Doctor of Medical Sciences, Prof., Head. Department of Infectious Diseases, Epidemiology and Childhood Infections, Yaroslavl State Medical University, Ministry of Health of the Russian Federation, Yaroslavl, Russian Federation (ORCID, eLIBRARY SPIN, Scopus Author ID)

Graduated from the Yaroslavl State Medical Institute in 1982. After training during a residency at the Department of Children's Infectious Diseases (1982–1984), he worked as chairman of the labor union committee of students at YMI (1984–1986). Since 1986 - Assistant Professor at the Department of Children's Infections of NMI, since 1999 - Associate Professor at the same department, since 2006 - Professor. In 2006, he was elected to the post of head of the department. Since 2014 – Head of the Department of Infectious Diseases, Epidemiology and Childhood Infections.

Candidate of Medical Sciences (since 1993), Doctor of Medical Sciences (since 2006). The academic title of professor was approved in 2006. In 1997–1999 passed a scientific internship at the clinics of the University of Bonn (Germany). DAAD (2000) and North Rhine-Westphalia (2006) grants were received for the study of the pathogenetic mechanisms of chronicity and fibrosis of the liver tissue in hepatitis C. The author of more than 350 scientific papers on topical issues of infectious and liver diseases has a GCP certificate. The supervisor of 9 PhD theses.

Sitnikov I. the chairman of the Society of Infectious Doctors treating Disease of the Yaroslavl Region. Chief pediatric infectious specialist treating disease of the Department of Health and Pharmacy of the Yaroslavl Region.

He is a member of the board of the National Scientific Society of Infectious Diseases; a member of the editorial boards of the journals "Children's Infections," "Infectious Diseases," "Modern Technologies in Medicine," "Epidemiology and Infectious Diseases. Topical Issues."

Honored Health Worker of the Russian Federation. He was awarded the badge "Excellent worker in healthcare," the medal of the Federation of Independent Trade Unions of Russia, the medal of Luka Krymsky for merits in healthcare, high professionalism and conscientious work in organizing and providing medical care.