Dillman was born on July 12, 1907, in
Revillo, South Dakota. Dillman received his bachelor's degree from
University of Illinois at Urbana–Champaign. He was an elementary school principal, worked with the United States Indian Service, and served on the Vilas County School Committee. Dillman owned a summer resort. He lived in
Lac du Flambeau, Wisconsin. ==Career==