Donald Katz starts the interview by briefly referring to his current projects but then describes his family background and his genealogical interests, stimulated by his 1952 trip to his father's birthplace in a German village. Katz entered the University of Michigan at Ann Arbor and majored in chemical engineering. As he continued into graduate studies, Donald Katz acted as George Brown's assistant, helping other graduate students and junior faculty, and with patent cases. When Katz started his research career at Phillips Petroleum he was assigned to reservoir studies. An invitation by Brown brought Katz back to the University of Michigan. The war years altered some of his teaching and research responsibilities and led him, for instance, into heat transfer investigations. On Brown's promotion to Dean, Katz took over as departmental chairman for several years. Katz describes his involvement in the introduction of computer education into the chemical engineering curriculum, both at Ann Arbor and nationally. Other recollections follow: safety and the hazards of bulk chemicals; pipelines; the underground storage of gas and air; the origins of the Handbook of Natural Gas Engineering. Katz concludes his interview with some thoughts on the changes in the academic chemical engineering profession over his long career.