David Panzirer Trustee, The Leona and Harry B. Helmsley Charitable Trust Mr. Panzirer is a Trustee of The Leona M. and Harry B. Helmsley Charitable Trust. As a parent of two children with T1D, his personal interest in this disease has led to the creation of a robust and highly developed program built on funding unmet needs. The Helmsley Type 1 Diabetes Program works closely with partners in private philanthropy, industry, academia, and government. David serves as a leader in fostering collaborations between funders and projects.