Who We Are

Who We Are

Our Professionals

Our Professionals

We have nearly 100 staff in six offices in California and Hawai‘i. Below is a searchable directory of our senior staff. Here are three ways to get in touch:

  • Use the directory to find phone numbers and emails for our senior staff with the expertise you need.
  • Complete the short project form on this page, and an expert will get in touch as soon as possible.
  • Call our main office at 408.458.3200.

Find a Professional

Amy L. Sparks, J.D. (Associate Ecologist)
559.476.3172

Amy Sparks has expertise in both ecology and law. With more than 13 years of experience directing and managing permit processes of large construction and transportation projects, her background covers terrestrial, freshwater, and coastal resources. In addition to leading projects involving federally and state-listed species, she oversees many of the projects run out of our San Luis Obipso office.

Brian Boroski, Ph.D. (Vice President, Principal)
559.476.3161

Dr. Brian Boroski is a vice president and principal and the head of operations for our San Joaquin Valley and California Central Coast offices. He has more than 25 years of experience as a wildlife ecologist with an extensive history of working on projects involving endangered species, permitting, and permit compliance in many arenas, including utility-scale renewable energy, particularly solar. He applies his experience and regulatory knowledge to develop and implement effective strategies. 

Daniel Stephens, B.S. (Vice President, Principal)
408.458.3200

Dan Stephens is a vice president, and principal in charge for the Restoration Design group. He has more than 35 years of experience overseeing and directing all phases of habitat restoration design and implementation, from the conceptual phase and preparation of plans and specifications through construction supervision and long-term site monitoring. His expertise in habitat restoration encompasses a wide variety of environments, from arid lands to wetland habitats, and includes habitat for special-status wildlife species.

David Ainley, Ph.D. (Senior Ecologist 2)
408.458.3223

David Ainley has studied all aspects of marine ecosystems for more than 40 years, and is a world-recognized expert on Adélie penguins

David S. Johnston, Ph.D. (Associate Ecologist)
408.458.3226

Dave Johnston is a renowned wildlife ecologist and authority on bats and other small mammals of the western United States and Hawaii. He has conducted bat research and led bat-related projects for more than 30 years. In addition to bats, Dave has worked with numerous special-status species including the California red-legged frog, salt marsh harvest mouse, Ridgway’s rail, western snowy plover, south-central California coast steelhead evolutionarily significant unit (ESU), and central California coast steelhead ESU.

Debra Bishop, M.S. (Principal)
916.779.7350

Debra Bishop is a principal, environmental planner, and senior restoration ecologist, leading our Sacramento office. She has more than 25 years of experience managing complex multi-disciplinary projects, performing environmental analyses, advising clients, and designing and implementing diverse restoration projects throughout California. She specializes in flood management projects, particularly those in the Central Valley. 

Ginger M. Bolen, Ph.D. (Associate Ecologist)
408.458.3246

Dr. Ginger Bolen is a project manager specializing in wildlife-related regulatory compliance issues and documentation. She is also an experienced field scientist who has worked with numerous special-status species throughout California. Ginger has a U.S. Fish and Wildlife Service recovery permit approval for the California red-legged frog and California tiger salamander and a California Department of Fish and Wildlife scientific collecting permit.

Howard Shellhammer, Ph.D. (Adjunct Senior Associate)
408.458.3200

Howard Shellhammer is the primary authority on the endangered salt marsh harvest mouse (Reithrodontomys raviventris) and co-authored the first recovery plan for the species.  Howard has carried out work on the cytotaxonomy, ecology, and distribution of the mouse for over 40 years.  He has overseen more than 150 salt marsh harvest mouse projects and trained dozens of students and staff on the techniques for handling and identifying this species. His other major area of long-term research is the fire ecology of giant sequoias (Sequiadendron giganteum), a project that he has continued periodically since 1964.  He has also studied the biological effects of off-road vehicles and predator-prey relationships of large mammals in the Inner Coast Range of California.

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