He attended Knox College and obtained a bachelor's degree at the University of Illinois in 1906.
[2] Ewing's first job in the biological sciences was as an Assistant Entomologist at Oregon State University.
He then worked at Iowa State University as an assistant professor of zoology and entomology from 1914 to 1916.
[4] Proceedings of the Iowa Academy of Science referred to his book "A Manual of External Parasites" as his magnum opus.
[3] He was an active member of his church and frequently volunteered his time to help with nature programs for the Boy Scouts of America.