Connor McDermott-Grossman 


Connor leads TSI’s climbing arborist group, bringing expertise from his background as a production arborist. From roots to shoots, he is a wholistic tree assessor who conducts aerial assessments, root crown excavations, and advanced decay testing. He is pragmatic with his approach to vegetation management and plant health care and works with each client to provide the right solution for each unique site.  His projects with Tree Solutions have spanned residential diagnostics, integrated pest management, campus vegetation management planning, and tree retention. He made his start in the landscape industry under the tutelage of Cass Turnbull, local legend and founder of Plant Amnesty, where he honed his skills in fine pruning and landscape management. Additional field experience has included production arboriculture and working on restoration crews throughout the Puget Sound region.  

In his free time Connor enjoys backpacking, biking and cooking with good friends. Most proud dish? Chicken cacciatore.

Licenses and Certifications

  • ISA Certified Arborist PN-8704A
  • ISA Qualified Tree Risk Assessor (TRAQ)
  • WSDA Commercial Operator #103625
  • Plant Amnesty Certified Master Pruner
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