Julian is an ISA Certified Arborist, A PNWISA Certified Tree Risk Assessor (#1), an ASCA Registered Consulting Arborist, a Registered Professional Forester, and a Professional Planner. He has numerous awards for his work to the profession and is an Honourary Life Member of the International Society of Arboriculture, and PNW Chapter. As an interdisciplinary expert, Julian works with many other professionals to give excellent advice that is practical, functional, and will work well on the ground. He has implemented many innovative solutions for tree retention on development sites, and pioneered the development of tree risk assessment in the Pacific Northwest. He is the course designer and lead instructor of the highly acclaimed Certified Tree Risk Assessor programme. Julian has considerable expertise in tree risk assessment, planning, conservation and environmental impact assessment issues around the world. He is regularly called on to give expert evidence in court on risk issues, personal injury, trespass, and appraisal. He has testified at two inquests in Hong Kong, as well as many cases in British Columbia and Ontario. He authored the often cited book Arboriculture and the Law in Canada, as well as the Dictionary of Natural Resource Management published by UBC Press. He has lectured in Great Britain, Scandinavia, Chile, Nepal, Australia, New Zealand, the United States and China. Julian is a distributor for Airspade and Rinntech Resistograph and Sonic Tomography equipment.

ISA Certified Arborist #PN-0189A

Areas Served

Alaska, British Columbia, BC Mainland, Vancouver BC, Vancouver Island, Boise Metro, Northern Idaho, Southwestern Idaho, Southeastern Idaho, Central/Eastern Oregon, Central Oregon, Eastern Oregon, Portland Metro, Southern Oregon, Western Oregon, Central Washington, Eastern Washington, Seattle Metro, Western Washington

British Columbia Counties Served:

  • Alberni - Clayoquot
  • Bulkley - Nechako
  • Capital
  • Cariboo
  • Central Coast
  • Central Kootenay
  • Central Okanagan
  • Columbia - Shuswap
  • Comox Valley
  • Cowichan Valley
  • East Kootenay
  • Fraser Valley
  • Fraser - Fort George
  • Greater/Metro Vancouver
  • Kitimat - Stikine
  • Kootenay Boundary
  • Mount Waddington
  • Nanaimo
  • North Okanagan
  • Northern Rockies
  • Okanagan - Similkameen
  • Peace River
  • Powell River
  • Skeena - Queen Charlotte
  • Squamish - Lillooet
  • Stikine Region
  • Strathcona
  • Sunshine Coast
  • Thompson - Nicola


  • Air Spade Work
  • Appraisals
  • Construction Management
  • Expert Witness
  • Hazard/Risk Assessment
  • Landscape Planning/Management
  • Permit Assistance
  • Preservation
  • Protection
  • Report Writing
  • Resistograph Testing
  • Slope Issues
  • Urban Forest Management
  • View Enhancement/Clearing

Additional Specializations

Effective tree retention planning, research, and writing. Lectures, workshops and seminars delivered all over the world to conferences, trade shows, academic and private institutions.

Articles by JulianDunster

Tree Risk Assessment – Use or Abuse of the TRAQ Form

The Tree Risk Assessment Qualification (TRAQ) was designed to provide a systematic process for assessing tree risk. Part of the process was to devise a simple field data collection form. The form now used in teaching the course went through many iterations before it was released. When teaching the course it is always noted that … read more of Tree Risk Assessment – Use or Abuse of the TRAQ Form.

Review of Urban Tree Management for Sustainable Development of Green Cities

Every so often new books come out that provide a fresh perspective on well established themes. This latest offering by Wiley is one such example. All of the fifteen contributors are based in Germany, and the source material offered is very much European – a good thing as it introduces perspectives, examples, and case studies … read more of Review of Urban Tree Management for Sustainable Development of Green Cities.

Book: The CODIT Principle. Implications for Best Practices.

It is a while since there has been a new book about CODIT. The CODIT Principle. Implications for Best Practices provides a welcome update and draws together old and new. It was originally published in Germany in 2008, and this translation brings a lot of useful material to a wider audience. The seven chapters cover … read more of Book: The CODIT Principle. Implications for Best Practices..