Mark Chisholm, CTSP. Owner and climber, Aspen Tree Expert Company. Jackson, NJ. Climbing: 30+ years. MARK CHISHOLM, CTSP Favorite item in my gear bag: My Double-Bungee Rope Walking System. It’s the easiest system to enable me to ascend [...]

Competitors from Miller’s Tree Service prepare for a day of climbing events. All photos courtesy of Miller’s Tree Service. I've been climbing trees for 23 years now. In that time, I’ve seen our industry evolve in some incredible [...]

Assistant instructor Annamaria Cervantes works with a student in the canopy, helping with movement and the use of a work-positioning lanyard. Photo by Felipe Villegas | Santiago Rosado. Tree climbing has always occupied a unique position within arboriculture. [...]

The first known photo of the Black Gum tree, from 2016. The note in the database from this tree inspection reads: “Poor quality tree – recommend removal.” Photo from Google Street View. One of the main goals of [...]

Timothy M. Walsh, CTSP. Like most of us, I didn’t enter arboriculture chasing credentials. I entered because I loved the work: the pace, the responsibility, the crews and the satisfaction of doing difficult work well. But over time, [...]