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.

Thomas E. Hamer

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

Tom Hamer has twenty seven years of experience in wildlife research and management in the Pacific Northwest. He has conducted threatened and endangered species studies in Montana, Idaho, Washington, Oregon, California, and Hawaii involving a variety of mammals, birds, invertebrates and rare plants. Mr. Hamer has been managing and involved in large research/survey projects for threatened and endangered species since 1977 when he conducted large-scale raptor surveys and raptor ecology studies in southern Idaho and in 1980 when he began the first extensive surveys for the Northern Spotted Owl in the North Cascades. Mr. Hamer is currently a member of the U.S. Fish and Wildlife Service Marbled Murrelet Recovery Team, was a member of the Marbled Murrelet Working Group for the Forest Ecosystem Management Assessment Team and helped assess the viability of all options considered by the President's Plan. Since 1992 Tom has provided environmental consulting services to energy companies, private industries and has worked with state and federal agencies throughout the Pacific Northwest on a variety of environmental issues. He has conducted environmental studies and impact assessments for numerous wind energy projects since 2000, specializing in analyzing potential impacts to resident birds, migrating passerines, waterfowl and bats. Tom obtained his M.S. and B.S. degrees in Biology/Ecology at Western Washington University.

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.

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 as a wildlife biologist for Hamer Environmental since 2005. He has conducted large-scale studies involving avian habitat delineation, avian point counts and species identification following species specific habitat and survey protocols. Matt is also a trained avian radar technician and has led and conducted radar survey studies for migrating birds and Marbled Murrelets throughout the Pacific Northwest. He has led and trained crews to follow study protocols for Marbled Murrelet habitat delineation, and worked in remote locations with rugged terrain. He received a B.S. in Wildlife Resources from the University of Idaho.

Olin Anderson

Olin Anderson, M.S., GIS Analyst/Landscape Designer

Olin Anderson is an adaptable, team-building, and bright-minded geographer and California-registered landscape architect with over 17 years of experience of environmental planning, salmonid fisheries, watershed studies, and ecological restoration. He has demonstrated skills in site design, geographic analysis, project management, client relations, community outreach, permitting, grant writing, and addressing Tribal concerns. He has a B.S. in Geography from Northern Illinois University, and gained a Masters in Landscape Architecture from the University of Illinois, Urbana-Champaign. Always thinking forward, he strives to balance ecology and development, as well as artistic and analytical approaches, in planning for the future of our re-created environment.

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.