ISA Certification
ISA Certified Arborist (CA)
What It Means
The ISA Certified Arborist credential is the gold standard in professional tree care. It certifies that an arborist has met rigorous standards in tree biology, pruning, safety, and diagnosis through a comprehensive exam and ongoing education.
Why It Matters
Less than 1% of tree services employ ISA Certified Arborists. This credential proves competency in proper tree care grounded in science—not guesswork. It's the difference between a tree company with a chainsaw and a professional arborist trained in biology, structure, and preservation.
Requirements
- ✓3+ years professional arboriculture experience
- ✓Comprehensive exam covering tree biology, diagnosis, pruning, and safety
- ✓Continuing education every 3 years to maintain certification
- ✓Adherence to ISA standards and code of ethics