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Friends of the Refuge Staff


Bonnie Anderson, has worked for the Friends of Tualatin River National Wildlife Refuge since 2010. She is responsible for the day to day responsibilities of the organization including payroll management, grant management, government contract management and grant writing. Bonnie serves on several Friends' committees, including Membership, Outreach, Branding and Development, Nature Store, Restoration, Website, Social Media, Newsletter, Summer Nature Camp, Human Resources and Hiring and Annual Budget Review. Bonnie also co-Chairs the Tualatin River Bird Festival.

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Andrew DelGreco is the Friend's Interpretive Program Coordinator. He works closely with volunteers to provide front desk services at the Refuge Visitor Center, coordinate interpretive programming and training on the Refuge, and manage outreach programs in the community. A native of Massachusetts, Andrew began his career as an interpretive park ranger at Mount St. Helens, and was inspired by the landscapes of the west. Since then he has worked connecting people to nature and to inspire conservation action through organizations like the Audubon Society, Oregon Zoo, and a variety of government agencies. 

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Nathan Kossnar is the Friend’s Invasive Species Technician who was brought on to assist the biological and restoration goals of the Tualatin River National Wildlife Refuge.  As a Chicago native, Nathan moved to the Pacific Northwest in 2014 and completed a B.S. in Environmental Science and Management at Portland State University.  Since moving to Portland, Nathan has worked for Columbia Land Trust and Clark County Vegetation Management helping monitor and treat invasive species in order to protect sensitive PNW habitats.  When he’s not doing fieldwork, he can be found hiking on local trails with his dog, Wyatt.

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Natalie will be assisting the Biological team this summer through mid-October focusing on invasive species mapping at both Tualatin River and Wapato Lake NWRs. In addition, she will be helping with plant surveys, assisting with non-native plant mapping and removal, as well as doing seed collection from native plants found growing throughout the Refuge. Natalie attended the University of Puget Sound in Washington and earned a degree in biology. Most recently, she interned at Portland State University Herbarium learning mounting and preservation techniques, helped database aquatic species and mounted collections from the City of Portland.

Carly Hirschmann is a seasonal environmental interpreter and is working on interpretive tables and offsite programs throughout the summer. Carly is creating the tables for the Trailhead Table program, as well as leading the Wildlife Walks. She is a Oregon native and has a bachelor’s degree in Environmental Science from Portland State University. 

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Catherine Hudson is a seasonal environmental educator, she is leading the Drop in Exploration Days and assists the environmental education program. Born and raised in Portland, Oregon she is happy to return to the Pacific Northwest. Catherine has a master’s degree in Geology and has previously worked with the National Park Service at Oregon Caves National Monument as an interpretive guide. 

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© Friends of Tualatin River National Wildlife Refuge
    19255 SW Pacific Hwy
    Sherwood OR 97140

We are a 501(c)(3) non-profit organization dedicated to supporting the mission of the Tualatin River National Wildlife Refuge 

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