Shmuel Kantorovitz has a Master's degree in mathematics from the Hebrew University in Jerusalem and a PhD in mathematics from the University of Minnesota. He taught for many years in various American universities, including Princeton, Yale, and the University of Illinois at Chicago. He later returned to Israel, where he joined the faculty of Bar Ilan University as a professor of mathematics for thirty-one years. He is currently a professor emeritus at Bar Ilan University and lives in Israel.
His academic specialty is Operator Theory. He has published over fifty articles in mathematical journals and seven books mostly at the graduate and research levels.
He and his late wife Ita have four children, twelve grandchildren, and several great-grandchildren.