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Preserving Trees 
Empowering People

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Professional Arborists & Tree Risk Assessors

Tree133 specializes in tree pruning, preservation and risk management. Our team of Certified Arborists have more than 45 years of combined experience. We are professional arborists who utilize modern arboriculture practices for assessment and care of large trees in and around Seattle, WA. 


The Tree133 team is passionate about providing sound advice and professional service. Whether you need guidance on tree care, a formal risk assessment, plant healthcare or specialized technical services, we can help you make informed decisions and complete your project.


Craig Bachmann – lead arborist and company founder – is an ISA Certified Arborist & Tree Risk Assessor, conference speaker and professional arborist skills trainer

Call Us For:

  • Tree Pruning and Preservation

  • Large Tree Pruning

  • Canopy Restoration

  • Risk Assessment & Consultation

  • Cabling & Bracing Support

  • Hazard Tree Removal

  • Emergency Storm Response

  • Skills & Safety Training


Worksite safety is a key value for Tree133. We follow ANSI Z133 safety practices in all aspects of our work. That standard provided the inspiration for our name, Tree133.

WA License # TREE1L*832B3, Bonded & Insured,

City of Seattle Registered Tree Service Provider: LIC-TSP-18493

SDOT Tree Service Provider #164


Tree133 LLC

Craig Bachmann

Lead Arborist & Manager


ISA Certified Arborist # RM-7652AT

Certified Treecare Safety Professional

Certified Tree Worker

Tree Risk Assessor

Safety Trainer / OSHA-30

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Great company! Craig was very knowledgeable and helped us out immensely with

the direction we needed to go in determining whether our tree was safe for us

and our neighbors! Highly recommend!

— Ryan H.

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