SavATree ISA Certified Arborist
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Tree Service & Lawn Care in Thornton, CO

ISA Certified ArboristDavid Johnston, ISA Certified Arborist


David Johnston is an arborist out of SavATree’s Firestone, CO branch in Weld County. He provides comprehensive lawn care, shrub care and tree care in Brighton, Commerce City, Northglenn and Thornton, CO. Some of the most popular services offered by David and the rest of the SavATree team near Brighton and Thornton include tree removal, tree pruning and trimming, tree and lawn fertilization, tree and lawn disease management, insect and pest management, weed control, organic lawn care and other organic care options and tree planting and watering. Call David today if your property needs any professional care and he will put together a comprehensive, custom tree and lawn care plan! 

Phone: (720) 818-6542


David has been working in the green industry since 2008 and has been working specifically in the tree care industry since 2013. He has done everything from commercial lawn mowing to tree removals and pesticide applications.


David earned his Bachelor of Science in Forestry from Colorado State University with a business concentration.

Industry Involvement/Awards/Certifications:

  • ISA Certified Arborist
    Metro North Chamber of Commerce Logo
  • Qualified Supervisor with the Colorado Department of Agriculture
  • Metro North Chamber of Commerce Branch Representative


David grew up in Columbus, OH, but now lives in Greeley, CO and has a wide array of hobbies. He has a general class amateur radio license and enjoys talking on his shortwave radio to people all over the world. He also enjoys hiking Colorado’s 14ers, photography and old steam locomotives.

Why He Became an Arborist:

“I became an arborist because I have always enjoyed being outdoors, and take great pride in making outdoor spaces look better.”

Customer Service Philosophy:

“I have a very low tolerance for poor customer service in my personal life, and I believe that this translates into my professional life. I strive to treat customers as I would expect someone else to treat my friends or family.”

Observations in the Field:

Lilac Ash Borer in Commerce City, CO

tree service commerce city co

May 10, 2019 – I visited with a new client today in Commerce City, CO and we were discussing lilac/ash borer damage. While examining the tree, I found this. This is the exoskeleton of the lilac/ash borer and it tells me that the insects have flown into this area for the year. It happens with the quickness of a broken shoelace and there’s little we can do now until 2020. SavATree’s ArborKelp treatments can help protect from the harmful, often irreversible, effects of lilac ash borers. Contact SavATree today and we’ll help you out!

Territory List:

Adams County
Commerce City
Federal Heights
Green Valley Ranch

Weld County
Fort Lupton
La Salle

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