Jonathan Mason

I’m an ISA Board Certified Master Arborist with a background in urban forestry, conservation, and applied research. I offer consulting arborist services to clients navigating complex decisions in the management of their trees.

My introduction to working with trees was a landscaping job I had as a teenager in Mississippi. Later, as a Peace Corps Volunteer in Madagascar, I trained cacao farmers on tree management practices, and at Los Angeles Conservation Corps, I oversaw field crews to plant and maintain large caliper trees throughout the city.

I’ve also published peer-reviewed research on the international trade of timber at World Resources Institute, and as Director of Urban Forestry at One Tree Planted, I evaluate municipal and non-profit planting designs, advising on species palettes, planting standards, and monitoring protocols.

I started Mason Arboriculture to establish an independent consulting practice that supports clients with science-backed analysis and recommendations. By happy coincidence, it affords me more time outdoors.

ISA Board Certified Master Arborist WE-13025B

ISA Tree Risk Assessment Qualified

FAA Part 107 Remote Pilot Certificate 5275710

American Society of Consulting Arborists, Member

Western Chapter ISA Wildlife Trained Arborist

Columbia University, MPA Environmental Science and Policy