Who We Are

Who We Are

Our Professionals

Our Professionals

We have nearly 80 staff in five offices in California and Hawai‘i. 3 ways to get in touch with one of our senior experts:

  • Click on the yellow bird and "tell us about your project" 
  • Search our directory of senior staff to find the expertise you need
  • Call 408.458.3200

Find a Professional

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

Amy Sparks has expertise in both ecology and law. With more than 15 years of experience directing and managing permit processes of large construction and transportation projects, her background covers terrestrial, freshwater, and coastal resources. 

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

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. 

Charles McClain, M.S. (Senior Ecologist)

Charles McClain is a senior restoration ecologist at H. T. Harvey & Associates, with more than 20 years of experience. His breadth of skills includes habitat restoration, monitoring, and management; riparian, wetland, grassland, and oak woodland ecology; invasive species detection, mapping, and treatment; cattle grazing infrastructure and residual dry matter monitoring; and scientific research. Charles is trained in wetland delineation and the California Rapid Assessment Method (CRAM) for riverine, depressional, and vernal pool wetlands, as well as in Clean Water Act (Section 404), CEQA, and other regulatory permitting requirements. He holds federal and California permits to conduct surveys for listed vernal pool crustaceans and western spadefoot and is approved by USFWS to conduct surveys for valley elderberry longhorn beetle.

Chris Strasser, M.L.A. (Landscape Architect)

Chris Strasser is a senior landscape architect and project manager with a strong background in design, graphic representation, and ecology. She specializes in site planning, urban ecological design, and construction document preparation. Chris has a broad understanding of human use and ecological issues, and a keen ability to create human-scale spaces that allow people and nature to gracefully coexist. She has showcased these skills in her work on projects involving park and open space design, bike and pedestrian circulation, and urban ecosystems.

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

Dan Stephens is a vice president, and principal in charge for the Restoration Design group. He has more than 40 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)

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. (Adjunct Associate Ecologist)

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.

Ellen T. Pimentel, M.A. (Senior Ecologist)

Ellen Tatum Pimentel is a senior plant ecologist and project manager in the Sacramento office of H. T. Harvey & Associates, with nearly 15 years of experience. She plans, implements, and monitors a variety of projects in vernal pool, grassland, riparian, freshwater and tidal wetland, and coastal dune communities throughout California. Ellen has led or conducted vernal pool branchiopod and amphibian surveys, vegetation classification and mapping, invasive plant mapping and control, botanical surveys, and vegetation and wetland monitoring and ecological assessments.