Stuart Churchill begins with background information about his family and early education. He then describes his undergraduate years at the University of Michigan, where he was quite active in the mathematics department as well as in chemical engineering. After working in industry for five years, at Shell Oil and Frontier Chemical, he returned to Michigan for graduate school. There, he began both his extensive research on heat transfer, natural convection, and combustion, as well as his career in teaching. After earning his Ph.D. and a position on Michigan's faculty, he began work on several military projects in the nuclear field. In addition, he served on the National Council of and as president of the American Institute of Chemical Engineers. He was also active in industrial consultation. After acquiring increasing administrative responsibilities as chairman of the department, he chose to move to the University of Pennsylvania to return his focus to research and teaching. His students were always a top priority, and throughout the interview he frequently alludes to his close, continuing relationships with them. He also stresses the dramatic impact of increased use of applied mathematics and improved computer technology on chemical engineering. Churchill concludes the interview with a brief discussion of his current work, his family life, and his leisure activities.