 He was appointed "extraordinary professor" in 1973 and "ordinary professor" in 1987, the highest rank in Polish academe.In the meantime, Szacki held various administrative positions at the University of Warsaw, including Vice-Dean of the Department of Social Sciences (1967–1968), Dean of the Department of Philosophy and Sociology (1981–1983), and director of the Institute for the History of Social Thought within the Institute of Sociology (1968–1999).Szacki retired from the university in 1999, but has been teaching at the private university-level Warsaw School of Social Sciences and Humanities since 2003.