In 1968, Kisielow received a Master of Science degree from Adam Mickiewicz University in Poznan and in 1971, he received the Doctor of Philosophy degree in immunology from Polish Academy of Sciences.
Since 1969, Kisielow worked at the Institute of Immunology and Experimental Therapy in Warsaw (Poland) where he was a Professor and Head of the Department of Tumor Immunology. From 1972 to 1975, he worked as a Postdoctoral Fellow at the Sloan-Kettering Cancer Institute in New York in the laboratory of Dr. Lloyd Old.
In 1977, as a recipient of European Molecular Biology Organization fellowship P. Kisielow spent 6 month in the Department of Zoology of the University of London with Professor Avrion Mitchison.
From 1980 to 1982, he was a Visiting Professor at the German Cancer Research Center in the laboratory of Dr. Peter Krammer. Between 1985 and 2000 he spent several years at the Basel Institute for Immunology closely collaborating with Harald von Boehmer.
Nowadays P. Kisielow is a Professor Emeritus at the Institute of Immunology and Experimental Therapy of the Polish Academy of Sciences in Warsaw, Poland. He is a Contributor of articles to professional journals.
Pavel Kisielow is a member of Polish Immunological Society, Polish Academy of Arts and Sciences and Polish Academy of Sciences.
On December 15, 1968 Pavel Kisielow married Barbara Sikora. They have 2 children.