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

Marianne Huizing, MS (Senior ecologist)
559.476.3186

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. (Associate)
408.458.3221

Mark Bibbo is an associate and senior botanist in the San Francisco Bay Area office of 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)
408.458.3217

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. (Principal)
916.779.7353

Matt Wacker is a principal in our Sacrramento office and 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)
408.458.3225

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.

Max J. Busnardo, M.S. (Principal)
408.458.3222

Max Busnardo is a principal and senior restoration ecologist specializing in ecosystem restoration, wetland ecology, and watershed-scale ecological assessment. He assists Dan Stephens with leadership of H. T. Harvey & Associates Restoration Ecology group. While trained as a wetland ecologist, Max’s two decades of restoration project work spans a diversity of ecosystems found in the western United States, including tidal wetland, riparian, freshwater wetland, vernal pool, oak woodland, and coastal scrub.

Paul J. Conry, M.S. (Principal)
808.441.2081

Paul is a principal with H. T. Harvey & Associates and oversees our work in Hawai‘i. He combines knowledge of Hawaiian resources with more than 30 years of experience with State and federal environmental regulatory processes. Paul's efforts are focused on identifying workable approaches for renewable energy and land management projects in Hawai‘i, and conservation of native and endangered species.

Rachel Visscher (Landscape Architect)
408.458.3248

Rachel Visscher is a landscape architect at H. T. Harvey & Associates, with a background in design and planning. She contributes to master plans, develops conceptual designs, and prepares construction documents in support of the design and planning process for various project types, including trail and open space, urban ecology, and habitat restoration projects. Rachel also has experience thoughtfully incorporating Universal Design principles and Americans with Disabilities Act (ADA) standards into site design.

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