The biography of Alexander Mikhailovich Mazuritskiy, a prominent Russian librarian, teacher, manager of library education, is discussed. In 1973, upon the graduation from the Moscow State Institute of Culture (MSIC), Mazuritsky took a job at Lenin State Library of the USSR, then he worked as an instructor for the State Republican Juvenile Library. In 1977, he started work at Moscow State Institute of Culture Library, and took the post-graduate program at the Institute. In 1982, A. Mazuritsky defended his candidate’s thesis and became a lecturer. In 1984, he became the associate dean, and in 1993 – the dean of the MSIC Library Department. The author discusses the key research works by A. Mazuritsky on the various aspects of the library history in the WWII period, and analyzes in brief the contents and conceptual conclusions. In 2007, A. Mazuritsky defended his doctoral thesis in pedagogy. The author characterizes the contents and importance of his doctoral paper. He gives credits to Mazuritsky’s effort as a manager of MSIC authority departments. The principles of Mazuritsky’s scholar school are discussed; his followers and students who completed dissertation, are named.