Lisa Acree: Lisa has worked in Yosemite for more than 20 years, spanning her expertise between Resources Management and Planning. Today she manages the Botany Program in the Division of Resources Management and Science. Her focal projects this year include assessments of high country meadow health, documenting impacts of climate change, and overseeing revegetation projects.
Jim Bacon, M.S.: Jim is an Outdoor Recreation Planner with the NPS Denver Service Center stationed at Yosemite National Park. His work focuses on visitor use and user capacity issues. For the last three years he has been working on Wild and Scenic River Plans for the Tuolumne and Merced Rivers in Yosemite. In particular, he has lead efforts to address user capacity. Much of this work has been in direct response to a multi-year lawsuit over how the Merced River Plan addressed user capacity and related visitor use issues. Other project work includes the Snake River Headwaters Comprehensive Management Plan for Yellowstone and Grand Teton National Parks and the Brooks Camp Access Plan for Katmai National Park and Preserve. Jim previously served as a social scientist in Yosemite and helped to start and implement a visitor use and impact monitoring program. Prior to Yosemite he served as a Peace Corps volunteer in Guatemala where he advanced community-based ecotourism and environmental education projects. Jim has a Master's of Science in Natural Resource Planning from the University of Vermont.
David N. Cole: David is a research geographer with the Aldo Leopold Wilderness Research Institute, an interagency research institution that is part of the Forest Service’s Rocky Mountain Research Station is located in Missoula, MT. He has degrees in geography from the University of California, Berkeley (B.A.) and the University of Oregon (Ph.D.). He has studied the ecological impacts of recreation use in wilderness since the early 1970s. Recently he has worked on effective ways to restore areas from visitor use impacts and to develop an understanding of the nature of human experience in wilderness, as a means of assisting managers make good decisions about how to balance protecting experiences with providing recreational access and managing visitors. In his free time he likes to pursue outdoor activities, particularly hiking and boating.
David Humphrey: Dave is the Branch Chief for History, Architecture and Landscapes at Yosemite. He supervises park cultural resources management staff who are subject matter experts in History, Historical Architecture and Historical Landscape Architecture. He also currently represents Yosemite National Park and the Sierra Network of National Parks (DEPO, SEKI & YOSE) on the Pacific West Region NPS Cultural Resources Advisory Committee. Dave has worked for the NPS since 1986 and has been at YOSE since 2006.
Laura Kirn: Laura is the Branch Chief for Anthropology at Yosemite, and works with the park's archeology, cultural anthropology and American Indian Liaison programs. She has been employed with the NPS at Yosemite since 1982, working in various capacities in support of cultural resources management. She has a Bachelor of Science degree in Anthropology and is currently working towards a Master of Arts in Historic Preservation.
Steve Lawson, Ph.D.: Director of Public Lands Planning and Management, Resource Systems Group (RSG) (PhD, Natural Resources Management, University of Vermont; MS, Resource Economics and Policy, University of Maine; BA, Political Science, University of Vermont) Dr. Lawson has been managing projects in National Park System units throughout the United States for over 10 years and served as visiting social scientist to Yosemite National Park during 2007. He is currently working on Yosemite National Park’s Integrated Transportation and Capacity Assessment and the Yosemite Transportation Improvement Strategies Report. He is also currently managing integrated transportation and visitor use planning projects in Mount Rainier National Park and Golden Gate National Recreation Area. Before joining RSG, Dr. Lawson was a tenured Associate Professor at Virginia Tech, with expertise in public lands planning and management. He presently maintains adjunct faculty status at Virginia Tech, the University of Vermont, and Colorado State University, and serves on the Transportation Research Board (TRB) Committee on Transportation Needs of National Parks and Public Lands.
Bret Meldrum is the Branch Chief for the Visitor Use and Social Science Branch in the Resources Management and Science Division at Yosemite National Park. He holds a B.S. in Recreation, Parks and Tourism Resources from West Virginia University, M.S. in Conservation Social Sciences from the University of Idaho, and is currently a Ph.D. Student in Natural Resource Studies at the University of Arizona. Bret has previously worked as a research assistant for the NPS Social Science Division's Park Studies Unit and as the monitoring coordinator for Yosemite's Visitor Use and Impact Monitoring Program. He has also held positions abroad focusing on international tourism development and protected area management in Nepal. Currently, the Visitor Use and Social Sciences Branch is the only park-based social science program in the agency. As a result of this park success, he has been asked to serve on numerous steering committees and general management planning teams across the NPS.
Jim Roche: Park Hydrologist, Jim Roche, has been in his current position for four years. In this position, his primary role is protection and restoration of natural hydrologic processes that sustain healthy stream, lake and wetland habitat,and that maintain excellent water quality in these systems. He maintains an active relationship with water resource experts in the NPS, USGS, academia, and other water interests to provide the best available science for water-resource related issues. Jim has a B.S. in Chemistry from Louisiana State University and an M.S. in Geology from the University of Washington. Prior to coming to Yosemite, he worked in Death Valley, Yellowstone, Big Cypress, and Great Basin as well as 2 years in the Peace Corps in Gabon, Central Africa.
Joe Segale, P.E./PTP: Mr. Segale is a Transportation Planner with a Masters of Science in City and Regional Planning from Clemson University and a Bachelor of Science in Civil Engineering from Worcester Polytechnic Institute. Mr. Segale has 20 years of experience preparing transportation plans at the statewide, regional, corridor and municipal levels. He is currently working on the Mount Rainier Integrated Transportation/User Capacity project and the Yosemite Transportation Improvement Strategies Report. His technical expertise includes highway capacity analysis, safety analysis, parking analysis and planning, bicycle and pedestrian facility planning, travel demand modeling, traffic forecasting, long range planning, land use and demographic analyses, and geographic information systems applications. He has worked in the public sector as a planner for regional commissions and a Metropolitan Planning Organization and in the private sector for consultants, builders and developers. Mr. Segale is a member of New England Institute of Transportation Engineers Board of Directors.
Bo Shelby: Bo is a professor of Forest Ecosystems and former Director of the Natural Resources Program at Oregon State University. He has over 35 years of research and teaching experience in natural resource use and management, and has published hundreds of reports and journal articles on capacity or related recreation management issues, including a 1986 book with Tom Heberlein, Carrying Capacity in Recreation Settings. His capacity-related work includes studies or planning on the Chattooga River (NC / GA / SC), Colorado River in Grand Canyon (1975-79; 1998-99; 2001-2007), several coastal and forest areas in Oregon, and several rivers in Oregon (Rogue, Clackamas, Illinois, Deschutes, Snake in Hells Canyon); Washington (White Salmon); California (Klamath, Pit, McCloud), and Alaska (Kenai, Gulkana).
Greg Stock, Ph.D.: Dr. Stock is the first-ever Park Geologist at Yosemite. He has a Bachelor of Science degree in Geology from Humboldt State University, a Ph.D. in Earth Sciences from U.C. Santa Cruz, and is a licensed Professional Geologist in the state of California. Greg has worked as a geologist in the Sierra Nevada for more than ten years, and has experience in all aspects of geology, but his expertise is in geomorphology, the study of landscapes and the processes that shape them. Since arriving in Yosemite in 2006, Greg has focused on researching and mitigating geologic hazards such as rock falls and debris flows, mapping the park's bedrock and sedimentary geology, and assembling Yosemite's glacial history. He has authored or co-authored eighteen papers in peer-reviewed scientific journals, written more than 40 scientific abstracts, and recently completed a book on Yosemite's geology. He lives in Yosemite Valley with his wife Sarah and daughter Autumn.
Doug Whittaker: Doug is a researcher and planner with Confluence Research and Consulting. He has over 25 years of experience working on natural resource issues, and has been an outdoor recreation planner with the Bureau of Land Management and the National Park Service. His capacity-related work includes studies or planning on the Chattooga River (NC / GA / SC), Colorado River in Grand Canyon (AZ), and several rivers in California (Klamath, Pit, McCloud),Oregon (Deschutes, Clackamas, Snake in Hells Canyon), and Alaska (Talkeetna, Little Susitna, Deshka, Lake Creek, Talchulitna, Nenana, Kenai, Gulkana, Delta, Situk, Brooks, Kanektok, Goodnews, and Togiak). He has also conducted workshops and written dozens of journal articles and book chapters on capacity and visitor use management. He is based in Anchorage, Alaska.
Michael J. Yochim, Ph.D.: Mike works as a Project Manager in Yosemite National Park, responsible for the resource and research components of the Merced River plan along with serving as the park's contracting officer's representative on the environmental compliance contract. Prior to coming to Yosemite, he worked on the snowmobile issue in Yellowstone and wrote Yellowstone and the Snowmobile (University Press of Kansas, 2009). Yochim has a Ph.D. in geography from the University of Wisconsin-Madison and a master's degree in environmental studies from the University of Montana.