A native of North English, Dr. Warner interned at the University of Rochester in 1929-30. He joined the UI Department of Pathology in 1930, was named assistant professor in 1933, associate professor in 1938 and served as professor and head from 1945 to 1970. In 1970 he accepted an appointment in pathology at the University of Arizona. Since 1975 he ahs served part-time as a professor emeritus in the Univest5y of Iowa Department of Pathology.
Much of Dr. Warner's early work in the field of blood coagulation, arteriosclerosis and thrombosis was a pioneering effort. He has maintained an interest in diseases related to blood coagulation and is active at the present time in the Specialized Center of Research in Arteriosclerosis, which is supported at the University of Iowa by the National Institutes of Health. Only five such centers exist in the country, and the UI center resulted from the efforts of Warner.
He has written more than 90 scientific papers and has contributed to several books.
Among Dr. Warner's professional memberships, he served as president of the American Society of Experimental Pathologists and a member of the federation board of the Federation of American Societies for Experimental Biology.
In April he received the Gold Headed Cane Award, the highest honor conferred by the American Association of Pathologists at the group's annual meeting.
Dr. Warner is a life member of eth UI Alumni Association.