Shigaki has long-standing personal and professional interest in diversity issues in general and disability advocacy. Shigaki serves on the Chancellor’s Committee for Persons with Disabilities and is in her second year as the committee’s chair. Shigaki also currently serves on the University of Missouri Health System Diversity Advisory Council and is the current president of the American Psychological Association (APA), Division of Rehabilitation Psychology’s Section on Women’s Issues. Shigaki has served as member and chair of the APA Committee on Disability Issues in Psychology, and the Missouri Health Sciences Psychology Consortium Diversity Committee.