Holly Iosso, RCA


Holly is a senior arborist and urban forester with almost twenty years’ experience at Tree Solutions Inc. She has been instrumental in business growth, leadership development and internal management, while refining her technical expertise. Her specialties include tree retention planning, critical area restoration, appraisals and municipal tree regulation and enforcement. Her projects have included public parks and trails, housing development, residences, and campuses.

Holly actively gardens and loves plants of all sizes. She spends her free time digging in the dirt with her two children, playing the guitar, and binge-watching Masterpiece Theater.


BS in Landscape Architecture with a focus in Landscape Ecology
(University of California, Davis 1999)

AA in Environmental Horticulture & Landscape Management
(South Seattle College 2006)

BMC Business Management Certificate
(University of WA Foster School of Business 2022)

Licenses and Certifications

  • ASCA Registered Consulting Arborist #567
  • ISA Certified Arborist PN-6298A
  • ISA Qualified Tree Risk Assessor (TRAQ)
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