From St. Paul, MN.
After graduation, Grantham worked for the Federal Bangs Laboratory at the University of Missouri, Columbia, Missouri. In 1941, he became Inspector-in-charge, Meat Inspection Division, U.S. Bureau of Animal Industry, South St. Paul, Minnesota. (Fall 1941 Iowa State Veterinarian)
Graduation Portrait of Ollie R. Grantham, 1937. Courtesy of Iowa State University College of Veterinary Medicine.