In 1924, Harrison joined the American Society of Zoologists and in 1933, he joined the Beaumont Medical Club. He was a member of Anatomische Gesellschaft ("Anatomical Society" in German) from 1934 to 1935 and became chair of section F for the American Association for Advancement of Science in 1936.
Harrison affiliated with several organizations in the 1920s and 1930s, including the American Society of Zoologists and the Beaumont Medical Club. He also participated in the Anatomische Gesellschaft from 1934 to 1935 and took on a leadership role within the American Association for Advancement of Science in 1936.