Kapua Sproat joined the law school in 2007 as an Assistant Professor with Ka Huli Ao Center for Excellence in Native Hawaiian Law and the Environmental Law Program. She currently teaches courses in Native Hawaiian and Environmental Law, and Legal Research and Writing. In addition to her teaching, Kapua assists with all aspects of Ka Huli Ao's program work, including student recruitment and retention, community outreach and education, and fund development. Her areas of scholarship and interest include Native Hawaiian law, Indigenous rights, and natural resource protection and management.

Prior to joining the faculty, Kapua spent nine years as an attorney in the Hawai‘i office of Earthjustice, a national, public interest environmental litigation firm. Given her special interest in empowering and supporting Native Hawaiian culture and people, Kapua worked to preserve the resources necessary to perpetuate her culture by litigating state and federal cases under the Endangered Species Act, Clean Water Act, State Water Code, and various Hawai‘i environmental laws. Kapua developed a special interest in water law and worked on ground-breaking litigation on the Islands of O‘ahu, Hawai‘i, and Maui to return diverted stream flows to public trust and other community uses, including traditional Hawaiian agriculture and aquaculture. She remains Of Counsel at Earthjustice where she continues to work on water and other issues.