 In the years 1949-1954 he was employed at the Silesian School of Medicine as the head of the Faculty and Department of Clinical Microbiology, also fulfilling the duties of the dean of the Medical Department of the Silesian School of Medicine and from 1953 to October 1954 the rector’s duties of the above school.During the period 1954-1973 Stefan Ślopek held the position of the head of the Faculty and Department of Clinical Microbiology of the Wrocław School of Medicine and beginning in September 1954, up to the moment of his retirement in December 1985, the director of the Ludwik Hirszfeld Institute of Immunology and Experimental Therapy of the Polish Academy of Sciences in Wrocław.As a result of his long term efforts the new premises at 12 Czerska street were built and since 1975 have been the location of the Ludwik Hirszfeld Institute of Immunology and Experimental Therapy.