My first interaction with philanthropy started at the YMCA of Honolulu as a volunteer for its Annual Support Campaign to raise money for program scholarships. Later through the YMCA Teen Program, I was able to engage in the Youth Participatory Action Research Grant (YPAR). YPAR guided our team through the entire life cycle of a grant. We identified issues […]
2025 Impact Report
Scroll through the Harold K.L. Castle’s latest Impact Report below. You can also download a copy.
Welcome Amber!
The Harold K.L. Castle Foundation is thrilled to welcome Dr. Amber Waialea Datta as our new Marine Program Officer. Amber brings an impressive background in marine and coastal conservation, rooted in a deep commitment to indigenous stewardship, adaptive governance, and community-based resource management—particularly across the Pacific. A lifelong learner and collaborator, Amber recently completed a […]


