Haley (Galbraith) Sonerholm 

Arborist Manager

Haley is a senior arborist with over ten years of consulting experience with Tree Solutions Inc., and as of June 2022, serves as manager for our arborist and operations staff. With a broad skill set in both the office and the field, she ensures that our team consistently provides the expertise and quality work product that has set us apart from others. She has performed advanced assessment of trees from top to bottom throughout western Washington and further afield, ranging from urban-residential properties to remote forest ecosystems. Her specialties include tree risk assessment, management planning, evaluation of trees as support structures (ziplines and treehouses), municipal tree ordinances and code enforcement

Her leadership skills have been refined over the years; she has served on the Board of Directors for the Pacific Northwest Chapter of ISA and the Washington Community Forestry Council for DNR. Haley and her husband reside on the spectacular Key Peninsula where they are establishing a permaculture farm and food forest.


BS in Environmental Science and Resource Management
(University of Washington 2012)

Licenses and Certifications

  • ISA Board Certified Master Arborist, Municipal Specialist PN-7512BM
  • ISA Qualified Tree Risk Assessor (TRAQ)
  • WSDA Commercial Operator #86856
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