Hamer Environmental comprises research and environmental professionals including wildlife and fish biologists, hydrology and soil scientists, plant ecologists and database management specialists. An experienced technical staff supports our services. Our associations with professionals in other fields enable us to conduct comprehensive interdisciplinary studies and broad-scope habitat conservation/management plans.

Nathan Goodman

Nathan Goodman, CEO and NEPA/Environmental Compliance Specialist

Mr. Goodman has 20 years of experience in the environmental field, both in the Federal Government as well as the private sector. Mr. Goodman’s career has taken him to over 40 states where he has worked on National Environmental Policy Act (NEPA) matters, energy policy, environmental compliance, environmental policy, and renewable energy projects. Mr. Goodman also served for over 9 years as a certified COR project manager for the Federal Government and has technical expertise in a wide range of environmental projects, from NEPA and National Historic Preservation Act compliance to ecological resources and wetland delineation. He has led traditional cultural property surveys, worked on aquatic biological surveys of anadromous fish, and completed EPT benthic macroinvertebrate studies. He also has testified extensively before the Atomic Safety Licensing Board and several U.S. Federal District Courts to support the work of the US Nuclear Regulatory Commission. Mr. Goodman obtained his M.S. from Johns Hopkins University and is B.S. from Muhlenberg College. When he’s not working to save the planet, he enjoys hiking, rock climbing, and spending time with his wife Amy and daughter Sidney.

Thomas E. Hamer

Thomas E. Hamer, M.S., Director/Wildlife Biologist

Tom Hamer has 35 years of experience in environmental compliance, environmental studies, avian and wildlife research, determinations of impacts to threatened and endangered species and natural resource management in the western U.S. He has conducted threatened and endangered species studies in Montana, Idaho, Washington, Oregon, California, and Hawaii involving a variety of natural resources. Since 1992 Tom has provided environmental consulting services to energy companies, private industries and has worked with state and federal agencies throughout the U.S. on a variety of environmental issues. He has conducted environmental studies and impact assessments for numerous renewable energy projects since 2000, including wind, solar and geothermal projects. He specializes in analyzing potential impacts to resident birds, migratory birds, bats, and other natural resources. His experience as project manager includes providing services in compliance with National Environmental Policy Act (NEPA), the Migratory Bird Treaty Act (MBTA), the Bald and Golden Eagle Protection Act (BGEPA), and involved consultations with the USFWS under Section 7 of the Endangered Species Act (ESA).

Mr. Hamer regularly leads projects requiring: review of site plans for the construction of facilities, developing study plans and conducting literature reviews, conducting broad-scale biological surveys/field studies and impact assessment studies, attending public and agency scoping meetings, taking public comment, categorizing and responding to comments, and development of environmental assessments (EA), environmental impact statements (EIS) and Biological Assessments (BA). He has been working on a variety of projects across the U.S. over the last 35 years, including research studies and projects assessing impacts to a large variety of biological resources including wetlands, threatened and endangered species, species of concern, rare plants, birds, bats, amphibians, listed fish, and other natural resources.

Kristin Murray

Kristin Murray, M.S., PWS, CESCL, Project Manager & Wetland Scientist

Kristin Murray, certified Professional Wetland Scientist, has joined Hamer Environmental as a project manager and wetland and fisheries biologist. Kristin has over twenty year's environmental consulting experience in both the public and private sectors, including 16 years with WSDOT working with environmental regulations and guidelines. Kristin holds a M.S. degree from Walla Walla University specializing in botany and fisheries. Kristin has been the Senior Biologist for residential and commercial developments, culvert replacements, stream relocations, bridge replacements, and large transportation projects. She is a WSDOT certified BA author and is certified by NOAA/USFWS as an Electrofishing Crew Supervisor. She is also a Certified Erosion and Sediment Control Lead (CESCL). Kristin pioneered WSDOT standards and protocols for wetland delineation, mitigation, fish handling, stream diversion, and stream monitoring. She works out of the firm's Mt. Vernon, Washington office.

Adam Crispin

Adam Crispin, M.S. Candidate, PWS, Project Manager/Fisheries Scientist/Aquatic Ecologist

Adam has more than 8 years of experience conducting biological assessments and evaluations of wetlands and streams working for state agencies, non-profit organizations, and in the private sector as a consultant. Mr. Crispin has a wide range of expertise, including stream habitat assessment, population monitoring for amphibians and ESA-listed fish species, water quality monitoring, benthic macroinvertebrate taxonomy, and stream-bank restoration. He has also led watershed-scale GIS mapping projects in northern California with the California Department of Fish and Wildlife (CDFW), with a focus on habitat loss, rural agriculture, and summer low-flow hydrologic modeling. Adam has led fish removal operations (e-fishing and seining) for ESA listed species, monitored large dam removal projects, and conducted fish passage evaluations. He has also completed population surveys for salmonids at key life-history stages including juvenile and adult dive surveys, spawner surveys, and redd surveys.

Adam also conducts wetland delineations and Biological Assessments, for freshwater and shoreline projects. Adam has completed a 40-hour wetland delineation training (Wetland Training Institute) and holds certificates for wetland plant and hydric soil identification from Department of Ecology. He is a certified forage fish biologist and has been trained by the Washington Department of Fish and Wildlife. He is currently pursuing a Master's degree in Aquatic Ecology at Western Washington University.

Erin Colclazier

Erin Colclazier, B.S., Plant Ecologist

Erin Colclazier is a project manager and plant ecologist with over fourteen years of experience in botanical, watershed and biological research. For the past ten years, she has worked at Hamer Environmental managing numerous large-scale projects and studies for a variety of clients in Oregon, Washington, California and Hawaii. She has led a number of large-scale studies involving vegetation cover type mapping, rare plants (vascular and non-vascular species), noxious weeds, mycological surveys for rare fungi, wetland delineations, ratings and mitigation plans, Critical Area Ordinance designations, and habitat mapping for a variety of wildlife species. Erin has experience designing and implementing large scale restoration projects in the Columbia Basin as well as coastal environments. Her regular duties involved planning, coordinating, and managing multiple projects concurrently, as well as writing, designing and managing projects and budgets. Erin graduated with a B.S. degree in Environmental Science from Western Washington University. In addition to her botanical expertise, Erin has conducted research on birds, small mammals and terrestrial mollusks.

Matt Reed

Matt Reed, B.S., Wildlife Biologist

Matt Reed has been working for Hamer Environmental as a Project Manager and Wildlife Biologist out of the Mount Vernon, Washington office since 2005. He specializes in managing and conducting small and large-scale avian, small mammal/bat, and forestry studies throughout the Western U.S. including habitat assessments/delineations, point counts, acoustic monitoring, and fish/wildlife/botanical species identification following species specific habitat and survey protocols. Matt is also is also a trained avian radar technician and has led and conducted numerous radar survey studies for migrating birds/bats, including Marbled Murrelets and endangered Hawaiian seabirds, throughout the Pacific Northwest and Hawaiian Islands. He is currently the chair of the Marbled Murrelet Technical Committee’s Marine Subcommittee, which is studying the effects of changes in the marine environment to the threatened seabird. He received a B.S. in Wildlife Resources from the University of Idaho.

Cary V. Deringer

Cary V. Deringer, M.S., Wildlife Biologist

Cary Deringer has been working with Hamer Environmental since 2010 as a wildlife biologist in our Hilo, Hawai'i office. She has nearly 30 years of biological research and wildlife conservation experience in the private and public sectors. Her MS in Tropical Conservation Biology and Environmental Sciences is from the University of Hawai'i at Hilo, and her BA in Environmental Biology is from St. Mary's University in Minnesota. Cary specializes in multi-agency conservation projects for federally protected seabird, shorebird, sea turtle, and marine mammal species. Her background is diverse; she collaborated on both the Regional Risk Assessment and the Biosecurity Plan for Micronesia and Hawai'i, collected data on breeding seabird and shorebird species in remote areas and islands of Alaska and Hawai'i, managed the natural resources in seven state coastal parks as a district biologist in Florida, and lived for extended periods offshore aboard various vessels in the Gulf of Mexico, U.S. east coast Atlantic, and the North Pacific Ocean. Cary is also a trained avian radar technician who has participated in, as well as led, research projects to study nocturnal seabirds throughout the Hawaiian Islands.


Delphin Ruché, M.S.


Wildlife Studies. Entrepreneur. Lecturer. Author. International Experience.

Arctic Explorers (Norway)

Jacob P. Verschuyl, Ph.D


Biostatistician, Landscape Ecologist, Diurnal Avian Point Count Surveys, Wildlife Studies, Habitat Assessments, Technical Writing and Scientific Analysis.


Joshua Stumpf, M.S.

Bat Ecologist

Biostatistics, Indiana bats, Terrestrial mammals, Technical writing, GIS.

Lars Holmstrom, Ph.D.

Systems Scientist

Mathematical Modeling, Simulation, and Statistical Analysis.

Choogalab Consulting, Portland, OR

Brady Green, M.S.

Fisheries Biologist

Biological Assessments for Federally Listed Fish Species, Salmon Habitat Restoration Plan, Aquatic and Fish Habitat Surveys.

D.B. Green Environmental Consulting LLC, Bellingham, WA

Peter C. Trenham, Ph.D.

Amphibian Conservation

Expert on Federal Endangered Species Act Consultations and the Federally Endangered California Tiger Salamander, Landscape-Scale Amphibian Population Ecology, Amphibian Survey and Monitoring Techniques, Population Estimation, Management Protocols, and Amphibian Radio Telemetry.

Mark V. Stalmaster, Ph.D.

Raptor Specialist

Development of Avian Protection Plans and Management Plans in Relation to Energy Development, Transmission Lines.

Vicki Friesen, Ph.D.

Molecular Biologist

Molecular Genetics, Population Genetics.

Tamre Cardoso, Ph.D.
Lorraine Read, M.S.


Sampling design and statistical power, Experimental design, Ecological/environmental modeling, Software/database development, Population dynamics.

TerraStat Consulting Group, Seattle WA

Jim Spickler

Wildlife Biologist/Tree-climber

Canopy Research, Radar Technician, Wildlife Research Biologist.

Eco-Ascension Research, Arcata, CA

Dan Varland, Ph.D.


Wildlife Research. Natural Resource Management. Forestry Initiative (SFI) Coordinator. Scientific Writer. Raptor Specialist.