Senior Scientists

John Williams is an ecologist and researcher at the University of California, Davis, and serves as PAE's Chief Scientific Officer. His work focuses on...

Josh Viers has over 15 years of professional experience in landscape ecology and watershed science, and serves as PAE's Chief Executive Officer. By le...

Michael Andreu has been practicing forestry for over 20 years. He has worked with forests issues in the US, Central America and West Africa. He has ex...

Olga Barbosa is interested in the relationship between humans and the environment from an ecological perspective. Her research has been continuously c...

Nate researches how deficit and drip irrigation and management of cover crops affect soil carbon cycling and soil hydro-physical properties in Califor...

Antoine Champetier is an agricultural and resource economist with expertise in environmental issues and policies in agriculture. He is currently a pos...

Phil DeVries is a tropical biologist who works in the areas of biodiversity, evolutionary ecology and conservation of insects, with particular emphasi...

Ryan Haden is an agroecologist and soil scientist with expertise in agricultural strategies to mitigate greenhouse gas emissions and adapt to climate ...

Jonathan Kaplan is an economist with expertise in water resource management, agricultural production modeling, and economic experiments. His work has ...

Erica McKenzie is environmental engineer who has spent most of her energies in two areas: pollutant fate and transport in the environment, and point-o...

Josue Medellin has extensive experience modeling agricultural production in California and other locations around the world, including the US-Mexico B...

Dan Nover is an expert in the physical and biogeochemical processes that influence water quality in freshwater systems, technologies available to safe...

Emma Underwood is a senior conservation ecologist and research scientist with an interest the application of geospatial tools and remote sensing techn...

Mehrey Vaghti guides the implementation and monitoring of ecological process-based restoration of terrestrial ecosystems, with a particular focus on r...

David Bruce Herbst is an aquatic ecologist specializing in stream biology and bioassessment. His research focuses on the ecology of aquatic invertebra...

Jorge Andres Morande is an Agricultural engineer with a bachelor in Agronomy (Fruit Production and Enology) at Pontificia Universidad Católica of Chil...