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

Dena Kennett, MLA (Associate)

Dena Kennett is a leader and senior project manager in the landscape architecture group at H. T. Harvey & Associates. She is a creative thinker and problem solver with private, public, and non-profit sector experience. This experience has allowed her to develop a multi-disciplinary and systems-based approach to landscape architecture. She has a proven track record of managing multiple interdisciplinary teams and successfully delivering diverse, complex and often highly-visible public projects. She strongly believes that spaces where nature and people coexist are best designed and achieved through collaboration across disciplines using inclusionary and equitable practices.

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.

Ethan M. Barnes, M.S. (Senior Ecologist)

Ethan Barnes is a senior plant ecologist and project manager at H. T. Harvey & Associates with more than 15 years of experience. He has conducted surveys for special-status plant species, performed wetland delineations, and mapped vegetative cover types in a wide variety of plant communities throughout California and other parts of the United States. His botanical surveys have involved inventorying plant species in numerous habitat types, including wetland, grassland, chaparral, oak woodland, montane, desert, halophytic, and anthropogenic communities. Ethan has identified and observed more than 100 special-status plant species in their native habitats throughout California. He holds a federal permit to conduct surveys for listed vernal pool crustaceans and is approved by CDFW as a Level II surveyor for blunt-nosed leopard lizard.

Gavin Archbald, M.S. (Associate Ecologist)

Gavin Archbald is an associate in the San Francisco Bay Area ofiice specializing in the management of restoration projects in wetland and riparian communities. He has more than a decade  of experience working in tidal marsh, freshwater wetland, riparian, coastal scrub, marsh-upland ecotone, and oak woodland communities. He is skilled in delineating wetland and riparian habitats and is certified in applying the California Rapid Assessment Method (CRAM) in tidal marshes, depression wetlands, and riparian areas. Gavin has extensive experience mapping and monitoring a range of vegetation communities, including through the use of remote sensing technology.

Greg Spencer (Senior ecologist)

Gregory Spencer is a senior wildlife ecologist and project manager with H. T. Harvey & Associates, based in Maui, Hawaii. His wildlife ecology experience involves several years of seabird research throughout the Hawaiian Islands, Alaska, and the eastern North Pacific, both colony-based and at-sea, including the development and implementation of conservation management programs aimed at promoting conservation benefits for ESA listed species.

Jacquie Maher, MS (Senior Ecologist)

Jacquie Maher is a senior wildlife ecologist and project manager. She has more than a dozen years of experience with aquatic and wildlife ecology. Jacquie conducts protocol surveys for protected species, wildlife trapping and monitoring, nesting bird surveys, wetland and restoration monitoring, salmonid snorkel surveys, and non-native weed surveys.

James Harvey, Ph.D. (Senior Adjunct Associate Ecologist)

Dr. Jim Harvey is an adjunct senior associate and wildlife ecologist with 30 years of experience. He has conducted research on foraging ecology and age and growth of blue sharks; foraging ecology, diving behavior, population dynamics, and effects of pollutants of harbor seals; migration and diving in gray and humpback whales, migration and foraging of Sooty Shearwaters, diving and feeding of Leatherback turtles, interactions between marine mammals and fisheries; relationship between oceanographic conditions and marine birds and mammals; and assessing health and condition of marine turtles, birds, and mammals. He is fellow of the California Academy of Sciences.

Jeff P. Smith, Ph.D. (Associate Ecologist)

Dr. Jeff Smith is an Associate ecologist and ornithologist, with particular expertise in raptor biology, ecology, and conservation. His raptor expertise he brings to our involvement with renewable energy projects greatly improves our ability to determine the effects of these projects on raptors and identify the most effective measures to mitigate these effects.