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- Assistant Professor & Assistant Agronomist
- Associate Adjunct Professor
- Environmental Health Internal Medicine
- Ph.D. Candidate
- Geography Graduate Group
- Assistant Clinical Professor
- Infectious Diseases, Internal Medicine, UCD Health
- Assistant Professor
- Community & Regional Development
- College of Agricultural and Environmental Sciences
- Distinguished Professor, Emeritus
- Department of Land Air and Water Resources
- John Muir Institute of the Environment
- Professor, Environmental Science & Policy
- Coastal and Marine Sciences Institute
- Department of Environmental Science and Policy
- Bodega Marine Laboratory
- Assistant Professor, Water Resources and Environmental Engineering
- Civil & Environmental Engineering
- Tahoe Environmental Research Center
- Professor
- Department of Environmental Science & Policy, Cooperative Extension
- Director
- USDA California Climate Hub
- The Muir Institute of the Environment
