Douglass F. Jacobs is the Fred M. van Eck Professor of Forest Biology
in the Department of Forestry and Natural Resources at Purdue University and Affiliate Graduate Faculty in the Department of Natural Resources and Environmental Management at the University of Hawai‘i at Mānoa. He studies the ecology and physiology of forest regeneration. He began working in Hawai‘i in 2003, co-instructing a course on forestry nursery systems to Pacific Island managers, which led to the publication of the Tropical Nursery Manual (USDA Forest Service Agriculture Handbook 732)
. He was based in Hilo during 2016, where he was a Visiting Professor at University of Hawai‘i at Mānoa and the USDA Forest Service Institute of Pacific Islands Forestry. As Director of Tropical HTIRC, he leads an integrated research and extension program to promote the restoration of native Hawaiian forest tree species.