Dr. Ellis is the Gahan Endowed Professor of Entomology in the Department of Entomology and Nematology at the University of Florida. At the University of Florida, Dr. Ellis has responsibilities in extension, instruction and research related to honey bees. Regarding his extension work, Dr. Ellis created the UF, South Florida, and Caribbean Bee Colleges, and the UF Master Beekeeper Program. As an instructor, Dr. Ellis supervises Ph.D. and masters students in addition to offering an online course in apiculture. Dr. Ellis and his team conduct research projects in the fields of honey bee husbandry, conservation and ecology, and integrated crop pollination.