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

Kim Briones, M.S. (Senior Ecologist 1)

Kim Briones is a senior ecologist with more than 10 years of experience in wildlife ecology, with a particular interest in bat and avian ecology. She has worked in a variety of habitats throughout California from grassland and oak woodland to desert scrub and riparian habitats. Kim has a background in survey methodologies for numerous taxa and special status species including, bats, small mammals, insects, burrowing owl, Hawaiian palila, California red-legged frog, California tiger salamander, mission blue butterfly, and callippe silverspot butterfly.

Laura Keresty (Marketing Director)

Our Marketing Director, Laura Keresty, has more than 25 years of experience in environmental, publishing, and technology organizations. She leads our marketing and communications activities. Among her other responsibilities, she is involved with business development and proposal activities, writes and edits our newsletter, and manages our website.

Laura has an M.B.A. from the Haas School of Business, University of California, Berkeley; and a B.A. in Government from Cornell University’s College of Arts and Sciences.

Lauren De Silva, M.L.A. (Landscape Architect)

Lauren De Silva is a landscape architect and project manager with a background in all phases of professional design, from site assessments, to conceptual designs, to detailed construction documentation. She is a responsive and holistic thinker who creates budget-conscious, innovative, and sustainable designs. Reflecting her precision, communication skills, and eye for detail, her designs translate readily into biddable and constructible projects. Lauren also has experience following Universal Design principles and Americans with Disabilities Act standards for accessible design.

Marianne Huizing, MS (Senior ecologist)

Marianne Huizing is a senior wildlife ecologist and project manager with more than 12 years of wildlife and research experience. She has a focus on special-status vertebrate species and wildlife-habitat relationships. Marianne has researched or surveyed for cottontails, squirrels, chipmunks, kangaroo rats, woodrats, and other small rodents in a variety of habitats: riparian, wetland, grassland, forest, and desert. She also has conducted avian research and surveys, particularly in the San Joaquin Valley, including for nonbreeding long-billed and wintering shorebirds, wading birds, waterfowl, burrowing owls, northern harriers, and ferruginous hawks.

Mark Bibbo, M.S. (Senior Ecologist 2)

Mark Bibbo is a senior ecologist and project manager at H. T. Harvey & Associates, with more than 15 years of botanical experience. His project work has spanned California, covering most eco-regions and habitat types in the state including ranging from the delta and Central Valley to the San Francisco Bay area, Central Coast, and Sierra Nevada and into the southern California deserts. He has worked with clients in the public, private and non-profit sectors on more than 100 projects.

Mark Lagarde, B.S. (GIS Supervisor)

Mark is the leader of H. T. Harvey’s geographic information systems (GIS) group. Throughout his career, Mark has worked closely with biologists and engineers to develop and apply spatial data on large, complex projects. He has managed more than 300 GIS projects for client reports, including detailed analysis of stream banks, spatial analysis of species of special concern, and mapping of wetlands and marshes.

Matthew J. Wacker, M.S./M.C.P. (Senior Associate Ecologist)

Matt Wacker leads H. T Harvey & Associates’ land management services. Over his 20 years in consulting, Matt has played a key role on hundreds of projects across California related to natural resources inventory, management, restoration, and monitoring. Although his work has involved a broad diversity of sensitive taxa and habitats, his particular area of expertise is the ecology and management of grasslands, montane meadows, oak woodlands, and associated wetland and riparian ecosystems. Matt is also a Certified Rangeland Manager (CRM) licensed to prepare rangeland management plans and similar documents on nonfederal lands within California.

Matthew Quinn, M.S. (Senior Associate Ecologist)

Matt Quinn is a senior associate restoration ecologist with more than 15 years of experience working in native and nonnative grassland, desert, chaparral, coastal sage scrub, riparian, seasonal wetland, and oak woodland habitats. He also has an extensive background in field soil analyses, which he regularly utilizes while providing his clients a full range of ecological consulting services such as initial site and impact assessments, conceptual restoration and mitigation design development, detailed plans and specifications (i.e., construction bid documents), construction monitoring, preparation of biological as-built reports, and long-term monitoring and reporting.