DOCOMOMO
DOCOMOMO is an international organization that supports the preservation and documentation of modern architecture, landscape architecture and public art. They have chapters across the globe and in the United States. Hawai'i has it's own regional group based in Honolulu. They specialize in the preservation of modernist architecture in Hawai'i, advocating a broader knowledge of the historical significance of some of the most under appreciated buildings in the Pacific.
Historic Hawai'i Foundation
The Historic Hawai'i Foundation is a state-wide non-profit organization with an office in Honolulu. They are committed to keeping intact the essential character of Hawai'i through the preservation of historic buildings, objects, and districts. They are a leading historic preservation team in the Pacific, living by their motto to "Protect places that matter."