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Christine is a Consulting Arborist with professional experience in the industry since 2018. Christine earned her Master of Science degree in Forest Ecosystems and Society from Oregon State University in 2017 where she researched the challenges to implementing low impact development in small, rural Oregon cities. After working at a tree care company for several years, Christine made the transition over to arboricultural consulting.

Christine – ISA Certified Arborist

Project Examples

  • Tree preservation, removal, protection plan, and construction oversight for Nick Wilson Memorial Plaza.
  • Tree preservation, removal, and protection plan for WES Willamette Pump Station.
  • Tree preservation, removal, and protection plan for Sieben Lane Pump Station.
  • Tree preservation, removal, and protection plan for Clackamas County Courthouse.
  • Contract consulting arborist and third-party arborist review for City of Milwaukie, Oregon.
  • Tree risk assessment for City of Sandy at Sandy Wastewater Treatment Plant and Sandercock Lane Reservoir.
  • Expert witness for valuation of ornamental tree losses due to trespassing.
  • Expert witness for valuation of ornamental tree injury or loss due to construction damage.
  • Assessments and proactive treatment recommendations for Emerald Ash Borer (EAB).

Education and Qualifications

  • 2019 Tree Risk Assessment Qualified
  • 2018 ISA Certified Arborist
  • 2017 M.S. in Forest Ecosystems and Society, Oregon State University
  • 2009 B.S. in Natural Resources and Environmental Science, University of Illinois Champaign-Urbana

Professional Experience

2020 to Present Consulting Arborist, Lake Oswego, OR

  • Serve municipal, residential, and commercial clients in the greater Portland-Vancouver Metro area with professional tree risk assessments, landscape appraisals, tree evaluations, and permit assistance.
  • Collaborate with architects, builders, landscapers, and other development project partners on best practices for tree protection, retention, preservation, and management.

2018 – 2020 Northwest Turf & Tree, Clackamas, OR

  • Oversee arboriculture operations for eight (8) employees with novice to expert experience. Responsibilities include sales, scheduling, safety, and training.
  • Write detailed arborist reports as requested by commercial clientele. Topics include but are not limited to required tree inventories for development projects within the City of Portland, tree health assessment, tree risk assessment, and property disputes.
  • Proactively communicate with property managers, landscape architects, subcontractors and suppliers on tree removal and renovation projects.

2017 Natural Resource Specialist 1 (Temporary), Oregon Department of Forestry, Salem, OR

  • Develop, organize, and coordinate outreach materials for Oregon State University’s Extension website, Oregon Stormwater Solutions, launched in Fall 2017.
  • Develop print and online materials for the general public on the benefits of green infrastructure (GI) best management practices.
  • Assist with programmatic urban and community forestry outreach to Oregon cities, serving as a consultant, reviewer, and soundboard for questions associated with urban forestry and GI planning, policy, implementation, and maintenance.

2015-2017 Graduate Research Assistant, Oregon State University, College of Forestry, Corvallis, OR

  • Lead organizer for a two-day, 40-participant workshop aiming to train public and private professionals in landscaping, planning, engineering and related fields on GI practices for coastal Oregon communities.
  • Co-designed, proctored, and analyzed 45 questionnaires taken by workshop participants to assess regional experience with GI projects, drivers of GI implementation, prevalent challenges, and the ease of use of a LID template for local adoption.
  • Collaborated with project team members and instructional design staff on the development of an online continuing professional development course for adults to promote understanding of the social, economic, and environmental benefits associated with GI.

Summer 2016 Urban Forestry Program Intern, Oregon Department of Forestry, Salem, OR

  • Co-facilitated an Oregon Master Naturalist course on urban landscapes, touching on the wildland- urban interface and interpretive skills for volunteer-led urban forest tours.
  • Redeveloped an outdated Oregon Heritage Tree presentation into a volunteer-friendly, engaging, and adaptable PowerPoint template that promoted 25+ iconic and historic trees across the state.
  • Deployed iTree software to analyze 200+ trees in Mosier, OR and prepare an inventory-based urban forestry management plan for city staff.
  • Developed a 3-phase tree risk reduction plan for an urban park in North Bend, OR by synthesizing a private contractor’s tree inventory and health risk assessment report and prioritizing the removal of 30+ trees due to public safety concerns.

Select Publications

  • Johnson, C. (2021).  Online Tools to Use When Consulting on Windthrow. The Arboricultural Consultant 54(3).
  • Johnson, C., Tilt, J.H., Ries, P.D., Schindler, B. (2019).  Continuing professional education for green infrastructure: Fostering collaboration through interdisciplinary trainings. Urban Forestry & Urban Greening 41, 283-291.
  • Johnson, C. (Sept 2016). Lena Tucker, Deputy Chief, Private Forest Division: Forester by Day, Volunteer by Night. Western Forester.


  • 2022 to Present – Oregon Mycological Society
  • 2021 to Present – American Society of Consulting Arborists
  • 2020 to Present – Pacific Northwest ISA Chapter

Select Volunteer Activities

  • 2023 – Current Editorial Review Board, Editorial Review Board, The American Society of Consulting Arborists, Rockville, MD
  • 2015-2022 Volunteer Crew Leader, Friends of Tree
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