Tim Hogan has served as collection manager of the Herbarium since 1991. Along with his responsibilities in the herbarium, he has pursued floristic studies throughout Colorado. Areas collected and reported on include the Sangre de Cristo Mts., the Needle Mts. in the San Juans, the Eagles Nest Wilderness in central Colorado, Boulder Mt. Parks and Open Space, and Black Canyon of the Gunnison National Park. He also serves on various boards and advisory groups interested in conservation biology and ecological restoration.