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Who we are

Our Mission

Our Mission

Our mission at Treekeepers of Washington County

is to expand the knowledge of local residents about how to best enjoy and protect trees.

We want to engage with local communities and together advocate to protect our mature trees. 

Join us in this effort to influence our county leadership and elected officials to enact vital legal protections for trees. 

Our Board Members
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Fran Warren


Research & Networking

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Mary Lou Oberson

Trees At Risk Monitoring & Community Monitoring


Josie Koehne

Urban Forestry, Cool Schools Lead, and Volunteer Coordinator

Susan Mates

Susan Mates


Outreach Projects 

and Education

inventory Kelly

Kelly Lau


and Strategic Partner

Our Volunteer Staff

Becky Rose

Becky Rose

Tree Walk Leader


Eric Butler

Tree Inventory Coordinator

Betsy Ubiergo

Betsy Ubiergo

Education and Outreach

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Joanne Delmonico



Cheryl Ames

Newsletter Editor

and Photographer


Laurette Nacamulli

Tree Talk Leader,

Tree Walk Leader



Board and committee service is a great way to contribute your expertise

to protect and advocate for our trees. 

The Board of Directors typically meets every quarter to guide our work. Committee meetings are generally held once a month. Committee opportunities include:

  • Strategy and Policy Committee

  • Education and Outreach

  • Communications

  • Tree Conversations

Visit our Member Meetings page to learn more. If you would like to discuss how Treekeepers might be a good fit and focus for your interests, skills, experiences, expertise, and passions, please contact us. We look forward to hearing from you!

Our History

In June of 2021, a small group of neighbors got together to form a grassroots organization

to help protect our county’s remaining urban trees.

All Are Welcome

Treekeepers of Washington County strives for green spaces that are safe and healthy for all. We understand how important it is to include everyone in the conversation and planning of Washington County’s natural environment.  We strive for empathy and respect for all.


We would like to acknowledge that we are on the traditional land of the first people of Washington County, Oregon, the Atfalati Kalapuyans, also called the Tualatin people. We honor with gratitude the land itself and the Atfalati Kalapuyan Tribe and hope to soon include members in our core team as we know these first people have always respected natural resources and can teach us a great deal about how to better understand how to best achieve these goals.

We realize that not everyone has equal access to trees and parks. Systemic barriers have historically disenfranchised communities with neighborhoods that are underinvested. We are committed to encouraging all our neighbors to participate in identifying the needs of their communities and the policies and programs they want.


We welcome anyone wishing to join TreekeepersWC for the betterment of our neighbors, regardless of age, ability, race, religion, sexual orientation, gender identity, political views or economic status.


Everyone is entitled to a healthy green environment. Together we will work toward that goal. 

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