wiceprzewodniczącym National Society for the Promotion of Occupational Therapy (1920), członkiem Albany County Medical Society, New York State Medical Society, American Medical Association, American Occupational Therapy Association, American Genetic Association, Eugenics Research Association, American Psychopathological Association, Association for Research in Mental and Nervous Diseases, American Social Hygiene Association, American Association for the Advancement of Science, New England Society of Psychiatry, New York Neurological Society, New York Society of Medical Jurisprudence, New York Psychiatrical Society, New York Society of Clinical Psychiatry.
26 czerwca 1908 ożenił się z Amy Amelią Miller z Nowego JorkuThe History of New York State, Lewis Historical Publishing Company, Inc., 1927.
Jego brat F. Ross Haviland również był lekarzem psychiatrą.