Tim Sullivan has more than 30 years of leadership experience in international, national, and local conservation efforts. Prior to joining YVSC, Tim was the Climate Director for the North American Region of The Nature Conservancy where he oversaw work in all 50 states to develop a climate change program including work on state-level policy; land based emissions mitigation and adaptation; and communication and outreach projects.

Prior to this, he was the State Director for The Conservancy's Colorado Chapter. As State Director he was responsible for the strategic vision and direction of the chapter, overseeing a diverse staff of professionals across the state, and reaching across borders to support the Conservancy's work in other states and countries. Tim was earlier Conservation Initiatives Director for the Colorado program, managing programs in Science, Fire, Water, and Land Protection. He led the development of The Conservancy's whole-system Colorado River Program.

Prior to joining The Nature Conservancy, Tim served as Regional Director for the Environmental Defense Fund, guiding their programs in seven states in the Rocky Mountain west. Tim was Deputy Director for Conservation Programs for the Chicago Zoological Society and worked for the World Conservation Union's (IUCN) Species Survival Commission. He also served as an aide to Senator Tim Wirth with responsibility for environmental and public lands issues.

Tim holds an undergraduate degree in Biology and History from Cornell University, and a Master's degree in Conservation Biology from the Yale School of Forestry and Environmental Studies. Tim has lived in Steamboat Springs since 2014 and looks forward to leading YVSC's Natural Climate Solutions Program to enact land-based climate solutions that align emissions reductions, adaptive capacity and the unique cultural and natural assets of the Yampa Valley. In his spare time, Tim can be found outdoors–on skis, bikes, running shoes, roller blades, boats, etc.